Best LED Grow Lights Reviews (2019): Our Top Picks for Every Budget

Best LED Grow Lights Reviews (2019): Our Top Picks for Every Budget2019-01-27T23:29:25+00:00

Best LED Grow Lights Reviews (2019): Our Top Picks for Every Budget

Best LED Grow Lights 2018: Best Full Spectrum LED Grow Lights on The Market

If you’re looking for the Best LED Grow Lights (2019) and full spectrum grow lights for your grow room, let us help you choose one. We know it’s a big investment and researching all the different options can take forever, so we’ve done the research for you. We’ve painstakingly compared and hand-picked the best LED grow lights on the market to find the right ones for a whole range of different use cases. Whatever your growing needs or budget, you can find a light here to suit.

Below, you’ll find award winners, bestsellers, budget options, quantum boards, supplemental lights, lights for small spaces or large grow rooms, as well as the lights most favored by our readers—in other words, the lights other growers like you are already using to get results.

Table of Contents

You can get more information on how to get started growing cannabis indoors from our free e-book (get it in the sidebar on the right), and from our regular reviews of the best grow tents, best nutrients and other top tools and equipment for your growing operation.

Get bigger, better buds faster!

Best LED Grow Lights on the Market for Growing Cannabis

We’ve covered a lot of lights below. So for your convenience, here are our three favorites:

Advanced LED Diamond Series XML 350 - Best LED Grow Light 2019Best LED Grow Light 2019: Advanced LED Diamond Series XML 350


MarsHydro 300W - Best Budget LED Grow Light 2019 (Under $100)Best Budget LED Grow Light (Under $100): MarsHydro 300W

Buy Here

HLG 550 V2 Quantum Boards - Most Efficient LED Grow Light 2019Most Efficient LED Grow Light: HLG 550 V2 Quantum Boards


We’ve also selected our Top 11 recommendations for 2019 and organized them into this handy table (if viewing on a small screen, note that the table is scrollable horizontally):

Advanced LED Diamond Series XML350 - EDITOR'S CHOICE: Best LED Grow Light (2019)Equivalent Wattage
Coverage Area
4.5' x 4.5'


MarsHydro 300W on eBay storeMarsHydro 300W - EDITOR'S CHOICE: Best Budget LED Grow Light (Under $100)Equivalent Wattage
Coverage Area
2' x 2'

Buy Here

HLG 550 V2 Quantum Board LED Grow Light - Most Efficient LED Grow LightHLG 550 V2 Quantum Board - EDITOR'S CHOICE: Most Efficient LED Grow LightEquivalent Wattage
Coverage Area
6' x 6'


Optic 4 LED - Best COB LED Grow Light 2019Optic 4 - Best COB LED Grow LightEquivalent Wattage
Coverage Area
3' x 3'


BESTVA Reflector Series Elite-1200W – Best LED Grow Light Under $200BESTVA Reflector Series Elite-1200W - Best LED Grow Light Under $200Equivalent Wattage
Coverage Area
4' x 5.2'


MarsHydro Mars Pro II CREE 128 600W – Best LED Grow Light Under $500MarsHydro Mars Pro II CREE 128 600W - Best LED Grow Light Under $500Equivalent Wattage
Coverage Area
3.5' x 6.5'

Buy Here

Kind LED K5 XL1000 - Best Programmable LED Grow LightEquivalent Wattage
Coverage Area
5' x 5'


G8LED G8-600 Full Spectrum MEGA LED Grow Light - Best LED Grow Light for Veg StageEquivalent Wattage
Coverage Area
4' x 5'


VIPARSPECTRA VT300 Reflector-Series 300W (Dimmable) – Best LED Grow Light for a Small Grow Room (Up To 2.5′ x 2.5′)VIPARSPECTRA VT300 Reflector-Series 300W (Dimmable) - Best LED Grow Light for a Small Grow Room (Up To 2.5′ x 2.5′)Equivalent Wattage
Coverage Area
2.5' x 2.5'


Black Dog PhytoMAX-2 400 – Best Commercial Level LED Grow LightBlack Dog PhytoMAX-2 400 - Best Commercial Level LED Grow LightEquivalent Wattage
Coverage Area
5.25' x 5.25'


PlatinumLED Platinum Series P900 - Best 1000W HPS ReplacementEquivalent Wattage
Coverage Area
4' x 6'


Click the product names in the table to skip straight to the individual light reviews.

If you want to know more about LED grow lights in general, we also have a Buyer’s Guide and FAQ at the end of the article. Just click the link to skip down to that section.

Here are the Best LED Grow Lights for the Money: Our Editors’ Choices for 2019

We selected our list of LED grow lights based on the results they showed and features they offer.

We have also taken into account factors like customer reviews, industry awards and a close look at which lights have proven most popular with our readers.

And we’ve tried to keep our choices within the budget of the average home grower.

Finally, below our Top 10 Recommendations, you’ll also find some great low budget options, some supplementary lights for flowering, and a selection of grow lights for small spaces.

When you’re interested in any of the lights, just click the ‘Buy’ button to check latest prices on Amazon.

We’ve linked to Amazon because pretty much everyone has an account. But we also highly recommend LED Grow Lights Depot and Growers House. Both give excellent service and it’s often well worth checking them out for exclusive deals and offers.

Now, here’s our top pick for 2019…

Advanced LED Diamond Series XML 350 – EDITOR’S CHOICE: Best LED Grow Light (2019)

In previous years, our overall Editor’s Choice went to PlatinumLED’s Platinum Series P900. We still love it, it’s a great light. But for 2019 we’re going with the Advanced LED Diamond Series XML 350 instead. For two reasons:

  1. The new Diamond Series is even better! No question. You still won’t go wrong with PlatinumLED’s P-Series lights, but with the Diamond Series Advanced LED have really surpassed themselves.
  2. We’ve noticed a majority of our readers favor relatively smaller lights (600W HID equivalents and below), so we’re following suit with our recommendations. However, don’t worry, most of the lights we’ve selected—including this one—are also available in larger models.

OK then. What’s so great about the Diamond Series XML 350?

This unit can comfortably cover a maximum grow space of 4.5′ x 4.5′, with core coverage of 4′ x 4′—or 16 to 20 plants. Which is more than enough for home growers in most U.S. states, for instance.

PAR when hung at 18″ is an exceptional 1395 and 987 at 24″ for a 4′ x 4′ space.

  • The sheer quality of the LEDs themselves: American-made 10W CREE XML single chip diodes (and Bridgelux blue and whites). These are the big upgrade vs. PlatinumLED’s Platinum Series. We’re talking super-bright, reliable, top brand LEDs.
  • Precision 90-degree XML Collimator lenses for optimal coverage
  • A 14+ wavelength spectrum (including UV and IR), to give your cannabis every kind of light it needs for big yields and dense, potent, flavorful buds.
  • Use it at every stage of the grow: clone, veg and flower modes—color select dimmable switches
  • Replace a 600 to 800W HID light for an average draw of just 330W. Which means over 50% less heat, no need for additional cooling and big savings on your electric bill.
  • Daisy-chain up to four units on one cord
  • Patented heat sinks, whisper quiet fans, dust filter and air flow vents—to keep LEDs working perfectly for longer
  • Modular design—certain faults can be fixed without sending the whole unit away for repair
  • 3-Year Warranty, 90-day Money Back Guarantee, hassle-free returns
  • US Sales and Support staff
  • Well worth the money, but look elsewhere if you’re on a tight budget.
  • If you want a fully programmable/customizable spectrum, this isn’t for you. (Keep reading for our recommendations.)

If the XML350 isn’t the price point or coverage you’re looking for, no problem. The XML lights are Advanced’s flagship lights, but the Diamond Series has plenty of other options available within its range.

The slightly cheaper Diamond Series XTE lights combine Osram LEDs and 5W CREEs. While standard entry-level Diamond Series lights use Bridgelux LEDs only. You’ll notice, though, that in all three cases all the LED chips still come from trusted manufacturers and are American-made.

Read our full review here.

Also available: Diamond Series XML 650.
Alternatives: PlatinumLED P600 (see below); Optic 6.

MarsHydro 300W – EDITOR’S CHOICE: Best Budget LED Grow Light (Under $100)

MarsHydro 300W LED Grow Light - on eBay store

Buy on MarsHydro eBay Store

MarsHydro has over 8 years in the business and a growing reputation. (See this post for why we recommend buying from the MarsHydro eBay store rather than Amazon.)

The MarsHydro 300W is very much one of Mars’ basic, entry-level full spectrum lights—but a very decent budget option. And still the company’s top seller. What’s so great about it?

  • High-intensity 5W Epistar LEDs are better than you’ll get in some similarly priced lights.
  • Coverage is respectable: 2′ x 2′, or enough for two big plants.
  • Replaces a 150W HID light.
  • Low power draw: only around 132W.
  • Suitable for the whole grow—plenty of both blue and red wavelengths in the spectrum.
  • Although the lights are made in China, there’s a service center in California and US and European warehouses to ensure quick shipping.
  • 3-year warranty.
  • Well under $100.
  • No UV or IR wavelengths in the spectrum
  • No veg/bloom switch or dimmers
  • Hanger not adjustable—but you can buy the adjustable one here

This light has been a very popular choice among our readers, hence our recommendation.

But if you’ve got the budget, also consider one of MarsHydro’s newer models in the Reflector Series or Pro II Series. You’ll get brighter, more even coverage and separate veg and bloom switches—not quite as cheap, but still at a very affordable price.

Want to know more? We’ve reviewed the identical but slightly larger MarsHydro Mars600 here.

Also available: Mars ECO 300W; Mars ECO 600W.
Alternatives: Viparspectra VT300; Roleadro GalaxyHydro 300W (both reviewed below).

HLG 550 V2 Quantum Board LED Grow Light – EDITOR’S CHOICE: Most Efficient LED Grow Light

Testament to the quality, affordability and popularity of HLG’s quantum boards is just how often they sell out. So if the light you want’s not in stock, sorry, you may just have to wait a bit—but by all accounts, it’ll be worth it!

Why? Because the HLG 550 V2 is the most efficient LED grow light to cover a 5’ x 5’ area! Or 6’ x 6’ for veg. With full-spectrum white light.

Thanks to clever design and the highest quality components, the efficiency is 2.5 umols of PAR per joule. So it’s replacing a 1000W HID light while drawing just 480W at the wall.

  • Surprisingly affordable—even pre-assembled quantum board lights like this one compare very favorably for price with similar power lights from the top manufacturers.
  • Ultra-efficient: 2.5 umols of PAR per joule.
  • Excellent penetration and very even coverage, due to…
  • 1152 top bin Samsung LM301B LEDs packed into an area 26” x 20”
  • Passive cooling, so no noisy fans.
  • High efficiency Mean Well dimmable driver (dimmable up to 50%).
  • Lower than average recommended mounting heights—just 22 – 32”. Meaning plenty of those photons hitting your plants at every grow stage.
  • See your plants in their natural colors, thanks to full-spectrum white light.
  • 3-year manufacturer warranty.
  • Designed and manufactured in the USA.
  • Super-helpful customer service.
  • Not programmable.
  • No in-built timers.

The HLG 550 V2 is available in 3000K or 4000K models. The spectrum of the latter has more blue in it, plus a bit more green and yellow. While the 4000K has a little more red and orange than the 3000K option.

Also available: Various smaller models and kits are also available, just check Amazon.
Alternative: Optic 6.

OPTIC 4 (3rd Gen.) COB LED Grow Light 405W (UV/IR) – Best COB LED Grow Light

Like quantum boards, COB (Chip On Board) lights are super-efficient and give you brilliant light penetration. Both also produce full-spectrum, natural-looking white light. The main difference is the way the diodes are spread across the unit—loosely speaking, a quantum board is like a COB light but with the diodes spread out. Optic’s COB lights boast genuine USA-made CREE XLAMP CXB2540 80W chips to give you coverage of 3.3′ x 3.3′ for veg and 3′ x 3′ for flowering.

  • Powerful and efficient: yields of up to 1.8g per watt—1.62 lbs per harvest.
  • Commercial level PAR output at an accessible price—1250 u/mols at center of footprint when hung at 24″.
  • Equivalent to a 600W HPS light but consumes only 405W at max power.
  • Bloom boost switch for flowering—turns on 64 Epistar and Bridgelux 5W LEDs.
  • White light, full spectrum output designed for cannabis—including UV and IR.
  • See your plants in their natural colors.
  • Built-in timer.
  • 5-year warranty.
  • “Industry best Return on Investment”, according to manufacturer.
  • Not as programmable as some similarly priced lights.
  • Not dimmable.
  • Quantum boards are better for short grow spaces—they can usually be hung closer to the plants.

The Optic 4 should be plenty large enough for many home growers. However, for bigger or smaller grows, Optic LED COB lights also come in a range of different sizes—all of them boasting pro-quality CREE diodes at a relatively accessible price.

We favor quantum boards over COBs, just slightly. But there’s really nothing much in it. Both give even coverage, excellent penetration and enviable yield per watt. So just go for whichever best suits your grow space. Either way, you’ll not be disappointed!

Also available: Optic 1; Optic 2; Optic 6; Optic 8+.

BESTVA Reflector Series Elite-1200W – Best LED Grow Light Under $200

Like MarsHydro and Viparspectra, BESTVA aims to create “well designed, well made fixtures at reasonable prices and no unnecessary extras” (BESTVA stands for best value). Unlike some budget brands, they’ve also been in the business a similar length of time to Mars and Vipar—around 8 years now—so we’re happy to recommend one of their lights here. This one’s a big seller on Amazon too. Probably because you get a lot of power for not a lot of cash—PAR at the center of the footprint is 1221 umols/m²s (hung at 24″).

  • Footprint of 4′ x 5.2′ when hung at 24″.
  • Replaces an 800W HPS/MH light but draws only 280W.
  • 60 dual-chip 10W Bridgelux and Epiled diodes.
  • Separate Bloom and Veg switches—saves money during the veg stage.
  • Passive cooling, so no extra moving parts that could fail.
  • Lifespan of 100,000 hours.
  • 3-year warranty and good reputation for customer service.
  • We prefer dimmers to Bloom/Veg switches that just turn diodes on/off rather than dim their intensity. Genuine dimmers can help with a smooth, gradual transition into flowering (higher intensity light) that minimizes shock to your plants.

Even if you shouldn’t expect average PAR across the footprint to be as good as the specs at the center, this is still an excellent light for the money. The customer reviews on Amazon and BESTVA’s own site are generally pretty glowing too.

Also available: Elite-600W; Elite-2000W.

MarsHydro Mars Pro II CREE 128 600W – Best LED Grow Light Under $500

MarsHydro Mars Pro II CREE 128 600W – Best LED Grow Light Under $500

Buy on MarsHydro eBay Store

High quality CREE diodes and excellent PAR figures at a very affordable price: what’s not to like?

There’s also a cheaper strand to the Mars Pro II series lights, with Epistar LEDs instead. And they’re great lights too… but CREEs are worth the extra few bucks.

And those CREE diodes are exactly what give these lights such impressive numbers: 1400 umols of PAR (hung at 18″), flowering coverage of 2′ x 4′ and veg coverage of 3.5′ x 6.5′ and a max. draw at the wall of just 355W.

  • Max. yield of 1.8g per watt—great value for money.
  • Replaces a 400-600W HPS/MH light, for a fraction of the energy costs.
  • Reliable, high quality build and components.
  • Excellent for all grow stages.
  • Separate Bloom and Veg switches—saves you money during the veg stage.
  • Much cooler than traditional HID/HPS/MH lighting.
  • 3-year manufacturer warranty.
  • No frills.
  • Switches rather than genuine dimmers.
  • Spectrum doesn’t include UV.

You won’t get fancy features and programmability with MarsHydro, but the sheer power, performance and reliability of these lights is hard to beat at this price.

Kind LED K5 XL1000 – Best Programmable LED Grow Light

Named “Best LED Innovation” by High Times STASH Awards 2017

Here’s a manufacturer that’s won more than one High Times STASH award. In 2016, Kind LED won “Best LED Innovation” for its GH Series of supplemental bar lights. Then in 2017, it got the same award again for this impressive beast of a light, the Kind LED K5 XL1000.

This is a true 1000 Watt HID replacement. It comfortably and evenly covers a footprint of 5′ x 5′ while drawing only 630W, to give you outstanding bud quality and yield per watt, plus significant electricity savings.

  • Programmable and fully customizable 12-band spectrum (including UVB & IR) and in-built timer.
  • You can exactly mimic the seasons and the sun’s passage through the sky during the day. It will slowly “rise” and intensify and slowly “set”.
  • Set different light recipes and schedules to optimize for different strains of cannabis.
  • Lights can be set up and controlled with a small remote control.
  • Control up to 100 lights at once with one remote!
  • The XL1000’s LEDs are truly dimmable—i.e. not just turning off diodes like many “dimmable” lights.
  • Runs very cool—without noisy internal fans or the need for extra cooling in your grow room.
  • UL Listed, meaning that it meets some very high safety standards.
  • Lifetime customer support and a 90-day money back guarantee
  • As you’d imagine, these aren’t cheap… But you get what you pay for.

We think this is pretty much the gold standard of programmable LED grow lights right now. And if you need something this powerful, it’s more than likely the light for you.

Read a full review here.

Also available: Kind K5 XL750.
Alternative: California Lightworks Solar System 1100 UVB. (Also superb, but who are we to argue with High Times?)

G8LED G8-600 Full Spectrum MEGA LED Grow Light – Best LED Grow Light for Veg Stage

“Best LED Grow Light” winner High Times Magazine’s STASH Awards 2016

The G8LED 600W MEGA LED Grow Light from DormGrow is well worth the price paid for the quality of what you get. High Times Magazine named versions of this light a winner in its 2016 and 2014 STASH Awards (and the bloom-only version was named “Best LED Light” in 2017).

It offers 8-band wavelength plus IR plus UV so it’s there to cover the entire growth cycle of your weed and make sure it’s potent and tasty. We’ve named it ‘Best for Veg Stage’ as, although it can be used for a full grow, DormGrow recommends adding a supplementary red light during flowering for best results.

  • Coverage of 4′ x 5′ at both flowering and vegetative stages, and canopy penetration of 5′.
  • Replaces an 800-1000W HID light, but draws only 380W at the wall.
  • Spectrum includes UV and IR.
  • High quality lights but very suitable for beginners.
  • These lights stay cool enough to touch even when they have been running for a full 24 hours.
  • 2-year warranty, serviced by DormGrow.
  • Excellent customer service—they even reach out to their customers to ensure everything is going smoothly.

They claim that running a light at full capacity and intensity, but adding some extra red wavelengths at flowering, is a more economical and effective way to use LED technology, compared to the usual approach where a single light is used and some of the red LEDs are dimmed or turned off during veg. Evidently High Time agrees!

Read our full, in-depth review here.

Also available: Need something more powerful? Check out our review of the G8-900.
Alternatives: Kind K5 XL-1000; HLG 550 V2 (both reviewed above); Black Dog PhytoMAX-2 800.

VIPARSPECTRA VT300 Reflector-Series 300W (Dimmable) – Best LED Grow Light for a Small Grow Room (Up To 2.5′ x 2.5′)

The VIPARSPECTRA VT300 has been pleasing a lot of customers because it hits the right balance of features for the money—it’s currently Amazon’s top selling Viparspectra light (Jan 2019). Indeed, what Viparspectra lights do so well is simply being affordable without too much compromise.

You can always expect good build quality, reliability and excellent performance. And unlike many other affordable brands, Viparspectra has a long track record. So you know the price isn’t too good to be true.

  • Cover a grow space of 2.5′ x 2.5′ hung at 24″ and 2′ x 2′ at 18″ without hotspots
  • Full-spectrum, 12 wavelengths (including IR).
  • PAR when hung at 18″ is 565 at the center of the footprint.
  • Can replace a 250W HID light while drawing only 134W.
  • LEDs are good quality, high-intensity 5W Bridgelux and Epileds chips.
  • Dimmable Veg and Bloom channels.
  • Remote control to operate light and program timer.
  • Built-in timer.
  • Daisy-chaining.
  • Lifespan of 100,000 hours.
  • 3-year warranty and a 30-day satisfaction or return guarantee.
  • No UV in the spectrum.

This is a highly affordable light (under or around $100), with quality and performance not compromised by the inclusion of unnecessary features.

Read our full review here.

Also available: VT450; VT600S; VT900; VT1200; VT1200S; VT1350; VT1800.
Alternatives: MarsHydro ECO 600W; KingPlus 600W (see below).

Black Dog PhytoMAX-2 400 – Best Commercial Level LED Grow Light

If you want to join the pros, Black Dog LED is one of the biggest names around. As well as a spectrum developed specifically for cannabis over more than 6 years, Black Dog lights are efficient and super-powerful. We’ve chosen the PhytoMAX-2 400 model because it’s a good size for most home grows. It gives even coverage over an impressive 4.25′ x 4.25′ footprint for flowering and up to 5.25′ x 5.25′ for veg.

  • Proprietary Phyto-Genesis spectrum maximizes yield, terpenes and potency—includes UV and IR.
  • Top bin diodes from CREE, OSRAM, etc.
  • 641 μMol/s total photon flux.
  • Replaces a 600W MH/HPS light—but drawing only 420W.
  • Large heatsink and quiet, reliable internal fans for outstanding heat management and maximum LED efficiency and lifespan.
  • White-looking light allows you to see your plants’ natural colors.
  • 6-12 month average return on investment—excellent value per watt.
  • Lifespan up to 70,000 hours (including the fans).
  • ETL, CE, FCC, RoHS safety certified.
  • Industry leading 5-year warranty.
  • USA-made.
  • Big up-front investment, but should pay for itself in bigger yields and low running costs.

If you want to take your home growing to the next level, Black Dog lights are reliable and widely trusted. They’re proven to grow big yields of top quality bud. You won’t find many growers with anything but praise for these beasts.

PlatinumLED Platinum Series P900 – Best 1000W HPS Replacement

All of the grow lights from the Platinum Series use revolutionary full-spectrum technology to keep your grow room and plants cool while meeting all their light needs. The P900 offers PlatinumLED’s trademark “3x intensity” lights that offer three times the brightness of many competing LED grow lights.

The P900 has 12 bands of light wavelengths including infrared and ultraviolet, the parts you can’t see with the naked eye. This panel, and others like it in the Platinum lineup, is about as close to sunlight as you can get indoors. But this isn’t a one-trick pony. This panel is good for every stage of growing cannabis.

  • Can replace a 1000 watt HPS light at full intensity, while still only using 515 watts of electricity—same or better light quality and intensity at around half the price.
  • Bloom coverage of 3′ x 5′, veg coverage of 4′ x 6′.
  • Awesome PPFD of 1250 umols hung at 24″.
  • Platinum LED claim “highest PAR per watt”.
  • 12-band full-spectrum from top bin US-made diodes.
  • Spectrum includes UV and IR.
  • Separate Veg and Bloom switches for energy savings during veg phase and a red boost during flowering.
  • LED drivers work with any voltage—can be used worldwide.
  • Excellent 5-year complete warranty with a 90-day money-back guarantee.
  • Established manufacturer with a proven track record.
  • High up-front cost, but should pay for itself with lower running costs, better bud and higher yields.

An adult cannabis plant takes up at least 1 square foot of space in a 3-gallon pot, so the P900 can flower between 12 to a maximum of 24 at a time. Which should be more than enough power for most home growers.

Also available: P150; P300; P450; P600; P1200.
Alternatives: HLG 550 V2 Quantum Board (see above).

Best Selling Budget LED Grow Lights on Amazon

The Amazon bestsellers list is packed with cheap LED grow lights. But are any of them actually worth buying? Are the prices too good to be true?

Well… it depends.

We hesitate to recommend a lot of those lights simply because the manufacturers are very new. So there’s no real proven track record yet. Even good customer reviews aren’t a great guide here, because they haven’t had the lights long enough to tell whether these apparent bargains are built to last. One good grow doesn’t necessarily mean they’re going to be going strong still in a year or two.

On the other hand, all manufacturers were new at some point. Some of these may be the next Viparspectra or MarsHydro.

And if it’s all you can afford, a really cheap light isn’t necessarily a bad place to start. You can still learn a lot about growing, without breaking the bank. And they can be fun to experiment with.

The thing with budget options is that there’s always a trade-off somewhere. At this price point you won’t get a light that does everything and does it brilliantly. We consider a good budget light to be one that’s strong in at least one department.


Some of the lights below are no-frills but bright and really do the job, while others pack in a lot of features for a relatively tiny price. All but the Meizhi go for less than $100.

But we feel all these lights strike a good balance between features and doing at least one important thing brilliantly.

Phlizon 600W Full Spectrum LED Grow Light – Amazon Best Seller

Although this doesn’t look a great deal different to a lot of lights out there, it’s currently Amazon’s best selling LED grow light (Jan 2019)! So what is it that sets this apart from the rest?

One word: Price! You get a whole lot of light for not much money here.

Not only that, but also a few features you don’t normally get in a light this affordable, such as separate Veg and Bloom switches, UV and IR and the ability to daisy chain multiple units. They even throw in a free temperature and humidity monitor.

The Phlizon 600W comprises sixty 10W double-chip LEDs for core coverage of 2′ x 2′ hung at 24″. It’s designed to replace a 400W HID, while consuming just 108W. The warranty is 2 years and it looks like experiences with Phlizon’s customer service have been very positive when problems have occurred.

Downsides? A few growers have complained that the fans are a bit noisy. Indiscreet packaging has been another occasional complaint. And some comparable but slightly more expensive lights have better PAR values.

Brightness is what matters most, so we’d recommend getting the highest PAR values you can afford.

But still, at this price point you rarely get so many features. It’s easy enough to see why so many people have given it a go.

King Plus 600W Full Spectrum LED Grow Light from KingLED – Another Budget Best Seller

Speaking of competitors to the Phlizon 600W… the King Plus 600W is also among the best sellers on Amazon right now (Jan 2019) and normally goes for about the same price. So how do they differ? Which one should you choose?

KingLED’s King Plus 600W claims better PAR values than the Phlizon, name-brand Epistar LEDs and a better 3-year warranty. Both lights include UV and IR in their spectrum. So if it’s simply brightness that matters to you, go for the King Plus.

The King Plus also claims to be a 600W HID replacement (but 400W is maybe closer to the mark) with core coverage of 3′ x 3′ at the veg stage. Power draw at the wall is 120W.

However, the trade-off versus the Phlizon is that the King Plus isn’t daisy-chainable, it doesn’t have Bloom/Veg switches and you won’t get a free temp/humidity monitor.

Again, we’d recommend getting the brightest light you can afford. But if money’s tight, or you just want to give growing a try without spending a fortune, this is a great budget option.

Ledgle Grow Light 300W – Budget LED Grow Light (Under $100)

While this is a relatively inexpensive full spectrum light, it’s got a lot of value for the money—and it’s been one of our Top 10 sellers.

For one, the LEDs are huge! They are 6-watts each and there are 50 of them, so this is an intensely bright light that works especially well for dense plants. The panel covers up to 2 by 1.5 feet when the plants are flowering.

The customization options are similar to those on more expensive panels. They include two switches, one for the vegetative stage, and one for flowering. The spectrum covers 11 bands including white light, UV, and IR. The two built-in cooling fans have a backup system to keep running even if one of their chips fails. Global Star offers a 1-year warranty that includes parts and service.

Roleadro GalaxyHydro Series 1000W – Budget LED Grow Light (Under $100)

Amazon’s current second best seller (Jan 2019), the Galaxy Hydro 1000 Watt panel is one of the least expensive grow lights we’ve reviewed. It’s a full spectrum light, also including UV and IR, with a power draw of 132W. It  covers 3′ by 3′ at most (for veg, not flowering), but it’s made to be daisy-chained. You can buy two or three of these for the same price of a larger light and link them together like Christmas lights to cover a larger space. GalaxyHydro offers a 2-year warranty with a 30-day money-back guarantee.

A previous version of this model remains very popular with our readers too. And this is a manufacturer with a bit longer track record than Phlizon and many other cheap lights. There are plenty of more powerful lights out there, but if money’s tight this one’s reliable enough to be worth considering.

MEIZHI Reflector-Series R450 450W LED Grow Light – Budget LED Grow Light (Under $150)

MEIZHI’s Reflector-Series R450 450W LED grow light is going head to head with brands like VIPARSPECTRA and Mars Hydro. Its PAR rating of 779 umol is amazing for this price point. Its ninety 5W LEDs cover the full spectrum needed for big healthy buds in your next harvest.

It can replace a 450W HID lamp and save you lots of money in the process because it only consumes 195W of electricity. Turn on the Grow switch for veg, then flip on Bloom for flowering. With 120° reflectors, the panel can cover a 3.5 by 2ft space by itself, or you can daisy-chain it for larger grow tents. Check out the full review for all the details of this budget light with big possibilities.

Looking for something larger? We’ve noticed our readers also appreciate the 600W version.


Best LED Grow Lights for Very Small Spaces or Supplemental Lighting (2019)

Some growers prefer to have one light running at full intensity for a whole grow, but then add in some red lights for flowering. For you guys, we’ve got a couple of supplemental bloom lights listed below.

Also, we know some of you only have space for a plant or two, while others might want to try something small-scale and low-cost for your first indoor weed growing attempts. So in this section you’ll also find a couple of great options for very small grow spaces.

TaoTronics Hydroponic 36W LED Grow Light TT-GL23

This light is tailored to those who are brand-new in their growing operation and need something that works for a small-scale grow room. If you only have a single plant, for example, why would you spend hundreds of dollars on a light for it? The TaoTronics Hydroponic 36W equivalent LED Grow Light is perfect if you want to master your craft without a big initial investment. It probably won’t last for your long-term goals, but it’s difficult to find a light that’s a better value.

Fits a standard E26 socket, lasts up to 50,000 hours and draws only 20W. This is the newest and brightest in the TaoTronics LED grow bulb line and also now has a 60° beam angle for better coverage. Even with one plant, we recommend using two bulbs for best results.

Roleadro 45W Panel LED Grow Light

Here’s another small grow light that’s been a popular seller with our readers. We would recommend it more for seedlings, these aren’t really powerful enough for any marijuana plants older than a couple of weeks. However, if you’ve got a separate germination area, a few of these low-cost panels could come in handy. And we’ve heard of them being used for supplemental lighting.

Apollo Horticulture GL60LED 180W LED Grow Light

Apollo is one of the better manufacturers when it comes to LED grow lights and indoor growing equipment, and this small LED grow panel makes an ideal option for a new small plant grower. It fits in a 2 by 2-foot space to cover up to three plants and uses only 90 watts of electricity.

This lamp is easy to hang as it’s lightweight and doesn’t require ballast. One of the features we like best about the Apollo is that you can hang this lamp closer to the plants than you can others because it runs cool. In fact, this is the lamp we like best for marijuana seedlings because it covers four important wavelengths of the spectrum.

This lamp though small has an impressive life span of over 50,000 hours and the company does offer a 2-year warranty, which is somewhat unusual for an inexpensively priced lamp. The lamp will work with all phases of growth including the flowering stage, although you may want to add a second lamp for that part.

ABI True Red 26W PAR38 Flowering lamp (to assist in blooming)

Let’s say you want a bigger yield but you’re already stretching the light from your LED panel to the limit. Many growers supplement with an extra red light or two. They encourage better blooming. Since they’re also LED lamps, they last for years, so they are a cheap investment.

This 54W-equivalent (actual draw 26W) red light bulb from ABI is an inexpensive way to get more buds and flowers on your weed. It fits in a standard household lamp socket or you can plug it into an extension cord made for light bulbs. Don’t worry, it’s not hot like an incandescent red lamp, it runs very cool.

G8LED 90W All Red Flowering Boost LED Grow Lights

The perfect accompaniment to the G8LED light listed above. Add one of these per 10 square feet of grow area at the flowering stage for higher yields, more resin and bigger, denser buds. They’re 90W HID equivalents, but draw only 75W. Would also work great with other full spectrum, full cycle lights without an extra bloom setting.


Our Favorite Light That Didn’t Make Our Top 10

Here’s one last light for our list of recommendations. It was in our Top 10 until last year, but even though it didn’t quite make the cut this year it’s too good a light to leave out entirely.

California Lightworks SolarStorm 440W LED Grow Light – Ideal for a 3′ by 3′ grow tent

California Lightworks SolarStorm 440W LED Grow Light definitely falls under one of the more expensive lights on this page, which along with not being a big seller among our readers was in part (see below) why it dropped out of our Top 10 this year.

But we still want to recommend it here, because this is one situation where you get the results you pay for.

Also, you might be able to pick one up at a bargain price soon—it’s been discontinued and replaced by the Solar System 550. That was the other reason why we dropped it from the Top 10.

However, the 440 remains pretty widely available for now. So we’ll keep this review up for the time being.

The SolarStorm 440 can replace a 600W HPS light while consuming only 235W during the vegetative stage, 320W in bloom mode and 350W during the final few weeks when the UV-B booster is turned on (see below). You’ll get coverage of 3′ x 3′ for bloom and up to 6′ x 6′ during veg.

This unit comes in a distinctive bright red color—a stark change from subtly-colored light panels from other manufacturers. And that’s far from the only thing that’s notable about the SolarStorm.

The light is a bit more intense than those with 3W chips, as this uses 5W OSRAM SSL LEDs instead—88 of them. The optics are all jewel-quality glass focused at 90 degrees. Plus, it has two T8 15W UV-B tubes to enhance growth at the flowering stage—a unique feature.

But don’t worry, this panel runs cool and quiet with its built-in fans. And as befits the price tag, it comes with a 3-year warranty to protect your investment.


Other LED Grow Lights We Considered and Recommend

Below are short reviews of a number of other excellent grow lights we considered for our top recommendations, or which we have featured in the past.

Even if some of them have been surpassed by some of the lights listed above, they’re all still solid, reliable, powerful options. We know these lights are all popular with our readers. And the manufacturers each have a proven track record.

So if you didn’t find what you were looking for above, stick around just a little longer. One of these lights will likely suit your needs.

VIPARSPECTRA Reflector-Series 600W – A 420 Beginner Readers’ Favorite

A big seller among our readers, the VIPARSPECTRA V600 is the bigger brother of the v300. It comes with all the same features, plus the addition of separate veg and bloom switches.

Replacing a 600W HID light and drawing just 269W on average, the V600 can cover a grow area of 3′ x 3′ hung at 32″ and 2.5′ x 2.5′ at 22″. At the center of the light’s footprint, PAR at 24″ is 530, 275 at 36″ and 784 at 18″.

Again you can upgrade for remote control programmability, built-in timer and even better coverage—in this case, to the bar-shaped VT600.

Or the VT600-S has the same square shape and the same coverage as the V600, but the best PAR values of all three V600 options.

VIPARSPECTRA Reflector-Series 450W – A 420 Beginner Readers’ Favorite

I guess you’d have to call this one the middle child, size-wise.

Anyway, our third biggest seller, the VIPARSPECTRA V450 is a 400W HID replacement, drawing only 200W. It will give you coverage of 2.5′ x 2.5′ hung at 24″ and 2′ x 2′ at 18″, and the respective PAR values are 415 and 655.

Again, it has separate veg and bloom switches. And there’s a VT version, the VT450, a narrower longer light which gives coverage of 3.5′ x 2.5′ at 28″ and 2′ x 2′ at 20″ and PAR at 24″ of 396.

MarsHydro Reflector 192 960 Watt LED Grow Light – Ideal for a 4-Plant Grow Room

MarsHydro Mars Reflector 960W full spectrum grow light

Buy on MarsHydro eBay Store

The MarsHydro Reflector 960W fits much better in a small square 4’ by 4’ grow tent than many of the rectangular panels we’ve reviewed. So if you’re in Canada, this would be plenty powerful enough for a four plant grow room (the limit where home growing is legal).

We noticed some slight singeing when we used the “flower” setting, but there were no such problems with the “veg” setting—one of the perks of an adjustable spectrum. Those with other lights in consideration will probably prefer to use this one as a back-up light, but it definitely excels when compared to less expensive options.

It wasn’t in our Top 10 sellers. However, among our readers this was one of the most popular lights of its size.

PlatinumLED Platinum Series P600 – Excellent 800W HPS Replacement

For one of the most advanced grow lights we’ve ever used, consider the Platinum Series P600. This grow light is a hefty investment, but most growers will agree that premium results are worth a premium price tag. The build on this is durable and easy to set up. It’s one of the best LED grow lights to buy (see also: “Top LED Grow Lights 2018 & Reviews from the LED Grow Lights Experts” on Big Buds Guide), if you have the money to invest in your crops. The core coverage area is about 2 feet by 5 feet, so you can hit the “Bloom” switch for about 5 to 10 plants, maximum.

The Platinum Series combines intense light and powerful fans so your plants don’t burn. The light is intense enough that you can physically see it penetrate the plants – an impressive feat. Further, these lights come with something completely unheard of: A 5-year warranty and exceptional customer service provided by the company directly. With the energy savings against an 800W HPS alone, this unit will pay for itself before the warranty runs out.

Read our full review here.

PlatinumLED Platinum Series P300 – A 420 Beginner Readers’ Favorite

For those who love the P600 but don’t have quite that large of a budget or size of a grow tent, the Platinum Series P300 is a great runner-up—and has been a popular light with our readers.

This is definitely a more affordable LED grow light that offers many of the same benefits as the P600, but at around half the price.

Its coverage is about 4.5 feet by 3.8 feet at an 18-inch height, perfect for compact grow areas, or when used in combination with additional lamps for larger areas. This light panel effectively replaces a 400W HPS light, while only actually using 180 watts of power—making it an energy efficient alternative to a traditional light. It’s just perfect for the small home grower. Just as the P600 represents the higher end of the market, this is still a serious piece of equipment—practically a steal for the amazing coverage you get.

PAR values

This is a system that has a great high PAR output. What does that mean? Well it means the panel gives off about 2 to 3 times the intensity of other grow lights.

More importantly, it has an 11 band spectrum that gives your marijuana plants the most nutritional value including those needed from UV and IR. The light chips are all 3W LEDs, and as I’ve mentioned before, the best 3-watt panels have an additional lens to focus the light a bit more. This panel comes with a 60-degree lens and secondary 90-degree focusing lens to give more intensity for plant growth.

The chips in this lamp are also replaceable and another reason for the slightly higher price tag. This means you can always keep that 400-watt output, even when a chip blows. Just order the one chip and replace it when it arrives from the manufacturer. With a 5-year guarantee, Advanced LED offers security to their customers.

For more info, check out our full review.


LED Grow Lights Buyer’s Guide & FAQ

Here’s our FAQ about LED grow lights. If you’re new to growing, or just want to brush up, enjoy! Also, check out our beginner’s guide to marijuana grow lights, which covers everything below in greater detail.

What makes the best LED grow light for indoors growing success?

Choosing the best light for your grow room depends on a few factors. You need a light powerful enough to cover the area where you grow, and that may vary depending on whether you have a dedicated space for seedlings and clones, or if your weed grows to maturity in one place.

Another factor is whether you want an all-purpose light, or if you plan to supplement it with other lamps for veg and flowering.

If you’re especially looking for low running costs or stealth growing, then LED grow lights are very much your friends.

Finally, at least with LED grow lights you don’t have to worry about replacing bulbs, dealing with ballast, or running too hot. All those things were problems with HID HPS/MH lights but they aren’t an issue with LEDs.

Let’s take a closer look at the best LED grow lights—and to help you choose the right light for your grow space we’ll make sure to include details of coverage area. And if you want to check coverage areas at a glance, just take a look at the table above.

How to choose the best LED grow light

Here are some of the most important things to keep in mind when choosing an LED grow light to grow cannabis:

  • The area you need to cover: The first thing that you should keep in mind is the area that needs to be covered. By knowing this, you can decide how many LED lights you will need, and which type of LEDs will provide you the best coverage. In order to cover more space, more lights can be placed adjacent to each other.
  • The phases of the plant growth: If you need a full growth cycle, you can select a full-spectrum LED grow light to assist in all phases. Or many lights have switches and/or dimmers for each grow stage.
  • Angle of the LED lens: Also look for the angle of dispersion within the LED bulbs. The greater angles mean more coverage while the lesser angles mean less dispersion and more direct light.
  • Your budget: Factor in the features that are necessary for you and the amount of money you are willing to spend—both up front and on running costs. An LED grow light can be expensive up front, but can save you money long term thanks to the much lower running costs.

Why choose full-spectrum LED grow lights?

The reason is simple.

Full spectrum LED grow lights are a relatively new product on the market and many growers are not all that familiar with these new lighting systems. Most people believe the giant fluorescent lamps or HPS and Metal Halide lamps are the best grow lights to use over an indoor growing marijuana garden, but they aren’t. Full spectrum light systems have the advantage, because:

  • They mimic real sunlight
  • Encourage high yields
  • Can increase potency and flavor
  • Cost less to run over time
  • Run cool and don’t need extra fans
  • Don’t flicker or need ballast
  • Their lamps don’t need replacing for 50,000 hours or more—that’s years of trouble-free service
  • They’re safer and more environmentally friendly

Consider updating an outdated system to a full-spectrum LED panel today. If you go with one of the picks below, we’re sure you won’t look back.

Put together your grow room kit

Some useful gadgets that will be helpful in your grow room:

==>Beginner’s Setup for Growing Cannabis Indoors<==

Sunglasses? Yes, we’re serious. You wear them outside, right? Protect your peepers from UV rays indoors too when you’re running a full-spectrum LED light. Remember, these lights are powerful!

Nutrients, even plants need their vegetables and minerals. The nutrients you give them don’t just affect yield, they affect flavor. Don’t have poop-flavored pot. Choose your plants’ nutrients wisely.

Grow tent. Yes, it’s a good idea even if you’re already growing in a closet or enclosed space. It’s easier to control the climate for your weed with a tent. You can protect them from stray light sources when they are supposed to be in the dark and you protect yourself from their light when you’re supposed to be sleeping. Plus, it keeps humidity under control and smells, too.

Light meter. Maybe you think only advanced growers use them, but you can use one, too. Then when you’re advanced, you’ll already know how.

Thermometer and hygrometer. Of course you want to know the ambient conditions in your grow tent. We picked the most kick-ass model on the market to show you. It will last you for years.

If you’re looking for a complete grow tent kit, including lights and everything else you’ll need to grow, check out this Custom Grow Room Builder tool from

How does it work? Just select how many plants you want to grow, your preferred lighting (LED, HID or CMH) and grow style (soil, coco coir, ebb & flow hydro or flood & drain hydro) and the site will offer you a selection of complete grow room packages ready to have shipped to you. Once assembled, all you’ll need are some seeds!

What is an LED Grow Light?

Let’s start with a little intro about LED grow lights.

  • LED:that stands for “light emitting diode”
  • Grow:it helps plants to grow best when they have been planted indoors
  • Light:it provides light energy that will mimic the way the sunlight would have affected these plants when grown outdoors

It provides various wavelengths of visible and invisible light including UV and IR rays that can directly increase the growth and hence the yield of any plant grown under these lights.

How Do LED Grow Lights Work?

How can these tiny little lights can help your plants grow better when there is no sunlight?

Plants have a tendency to absorb more blue light than other colors like white or green; hence, the UV rays are best to induce vigorous plant growth, while the infrared rays are best catalysts for germination and blooming boost.

The wavelengths can be adjusted according to the requirements of your plants in the grow room. If you have plants to grow that are in their vegetative phase, using UV rays would increase the cell division when the plants absorb the rays. Due to the increase in cell division, the plants grow quickly and result in more yield.

In case you need to treat your plant during the flowering stage, the most effective LED lights are those which provide IR, or infrared, rays. These rays are readily absorbed by the buds and apex of the plant and this causes them to bloom quickly and heavily.

We would recommend an LED grow light that has a wide range of wavelength options available, so that you can adjust according to the effects that you need.

The amount of light, type of light emitted, types of plants being grown, Lumen per area, wavelength, and the height between plants and the light can all affect the growth of the plant being treated.

What Are the Benefits of Using LED Grow Lights?

Before the rise of LED grow lights, there were other similar methods in use. These include high-pressure sodium lamps and fluorescent bulbs. These methods were not at all favorable for small grow room owners who need to have a small, compact structure. These lights needed a lot of space to set all the equipment, due to the huge amount of heat being produced and the need to have a proper ventilation system to avoid heat build-up. This mess made that process out of reach for the small grow room owners.

LED lights take up a minimal amount of space, don’t contribute extra heat, don’t need their bulbs replaced, don’t have ballasts to manage, and use half the electricity to run.

  1. Compact and easy to install:These lights come in a very compact structure that is very easy to handle. You will not need any specific knowledge to get them installed. You can just have a proper place to hang them above the plants at the required distance.
  2. No need for separate ventilation set up:These lights don’t emit a lot of heat and there is no need to have a proper ventilation system. They can work without any huge ventilation setup and type of large fans.
  3. Can be installed adjacent to each other:As said earlier they have a compact design and most of them can be installed adjacent to each other in order to give more coverage.
  4. Variety and control:Their wavelengths can be adjusted easily and also the modes for vegetative and blooming phase can be chosen.

All these factors have made us great fans of these LED grow lights, because they give us great results with a lot less hassle and cost.

How Many Watts Do You Need?

When it comes to LED grow lights, it’s not really about the wattage.

Firstly, wattage isn’t a measure of brightness or intensity. It’s just a measure of how much power is being drawn at the wall. Yes, if you compare two bulbs of different wattage but exactly the same technology, then the higher wattage will be the brighter bulb.

However, LEDs are much more efficient than HID lights, so an LED that draws the same power as an HID will generally be much brighter.

To complicate things further, there are various competing LED technologies.

And then there’s the matter of secondary optics to intensify brightness even further…

So how do you know if your plants are going to be getting enough light?

Well, first it depends on which strain you’re growing. Different strains have different light requirements. So we recommend that you first pick a strain, then start looking at grow lights.

Once you know how much light your chosen strain will need, compare it with the PAR and coverage charts provided by grow light manufacturers. A reputable manufacturer should give you plenty of information about what size of grow area their lights can cover and at what heights, as well as the PAR values across the whole footprint. Naturally you’ll need a light that can supply at least as much PAR as your chosen strain needs, but for maximum yields the more PAR you can give your plants the better.

What Are PAR Values?

Photosynthetically Active Radiation (PAR) refers to the wavelengths of light that plants can actually use to photosynthesize. The more of these wavelengths your cannabis plants are getting the better.

PAR is generally measured in two ways: PPF and PPFD.

PPF is Photosynthetic Photon Flux. Which just means how many photons of usable light are being emitted by the light. This is measured in micromoles per second (μmol/s).

PPFD, however, stands for Photosynthetic Flux Density. This is an even more important measure, because it specifies not just how much PAR is emitted by your grow light, but how much of that light actually falls on the plant. The numbers you’ll see are in micromoles per square meter per second (μmol/m²/s).

Some manufacturers only give you PPF, and others only give you measures from right in the center of the light’s footprint. Both tactics can allow sub-standard manufacturers to make inflated claims, by only stating their PAR values very selectively! So to be sure you’re getting what you need, always make sure to check for diagrams of PAR values across the whole footprint and at different heights.

What Are Quantum Boards?

Check out almost any thread about LED grow lights on grower’s forums or Facebook groups and sooner or later someone will usually start praising quantum boards — usually, even more highly than COBs.

I built and customized my own. It cost a fraction of other lights. The results are outstanding. I’d never go back… and so on.

Sounds great, right?

So what exactly are quantum boards? And what’s so amazing about them?

Well, a quantum board is basically clever printed circuit board technology that allows you to pack hundreds of intense, top bin LED diodes onto one board with no extra cooling needed.

That means very even coverage and deep penetration beneath the canopy.

They’re full spectrum white lights.

And most importantly: they’re about the most efficient LED lights out there.

On the downside, you don’t get the fancy features of some more expensive lights, such as programmable spectrum, built-in timers, remote control, smartphone apps, etc.

But most growers who’ve tried them would argue that performance, efficiency and lower costs more than make up for that.

And they are genuinely dimmable, without losing efficiency — unlike many lights with “dimmer” switches, which rather than truly altering brightness just turn off some of the diodes.

That gives you a bit of flexibility as to how you use them. For instance, you’ve got the option of dimming the light a little instead of raising it higher above the plants.

They’re also highly customizable. So you could easily build or customize one to the size and shape of your grow room. Or experiment to your heart’s content with different diodes and layouts.

But if you’re not into DIY, not a problem!

Horticulture Lighting Group (HLG), the manufacturer of quantum boards, sells complete pre-assembled grow lights, as well as grow light kits you can (very easily) assemble yourself and, for the more adventurous, just the boards on their own.

If you want a pre-assembled light, our recommendation is the HLG 550 V2.  See above for our reasons why.

Wrapping Up

Well, we hope you’ve enjoyed this massive buyer’s guide to the best LED grow light for your plants. For some more reviews and interesting reading, check out Big Buds Guide too. Good luck and happy growing!


  1. kabir July 17, 2018 at 7:06 pm - Reply

    Thanks for sharing such a good type of review.Among the lights I like Viperspecta because they are cheap and effective.

  2. Pete July 2, 2018 at 10:09 am - Reply

    In your beginners guide to growing, the writer makes a major mistake.
    It states
    Be sure you’ve received seeds that have a tiger-stripe pattern. Black seeds are dead and
    I don’t know where the writer got this idea from, perhaps a black seed didn’t germinate and a stripey one did so the event was conflated into this generalisation.
    Seeds are usually a pale brown, sometimes greenish brown, sometimes darker, rarely striped, some are black. The colour is related to their origin, seeds in African bush are big, dark and bold, seeds from Thai grass are small pale green.
    If you make basic errors like that, how much can the rest be trusted?

    • Mary Jane Farmer July 19, 2018 at 8:27 pm

      You’re right, it’s white and very pale seeds that rarely germinate. I don’t know how that got in there! The Guide does then refer readers to a later more detailed section on seeds and how to germinate, where thankfully the info is correct. But you’re right, that’s a bad mistake — our full apologies to anyone who might have been confused or misled by that line! I’m sure the writer must have meant to write white rather than black… but still, we should have caught it.

      We’ve now updated both the PDF Guide and the original blog post that part of it came from.

      Many thanks for pointing that out, Pete!

  3. Sam June 29, 2018 at 6:53 am - Reply


    Are you interested in reviewing our new Cob LED Model R10?


    • Mary Jane Farmer June 30, 2018 at 8:04 pm

      Thanks for the comment, Sam!

      Maybe. If you email details to we’ll take a look and get back to you.

  4. shirley May 17, 2018 at 2:38 am - Reply

    To save power with low wattage LED grow light, just visit the website:

  5. Bignugz420 March 14, 2018 at 9:35 pm - Reply

    I am no stranger to LED, I have so many I have a AMARE SE 450 collecting dust. Only bc I do have some of the sponsor led reviews or just got at such a good deal one company that nobody ever mentioned is BLACK DIAMOND PERFECT SUN GOLIATH, and my next is FOLEX SOLUTIONS, I HAVE 2 240K from there website it is definitely one of my best set of lights. 1000 watt HPS collecting dust, it’s crazy. So many lights be only 4 tents

  6. led grow lights February 6, 2018 at 7:42 am - Reply

    Nice blog post has been share.
    Thanks all of you for sharing this.

  7. Munjarin January 27, 2018 at 3:23 pm - Reply

    Thanks for your Nice Post

  8. MalandPeter January 20, 2018 at 5:17 am - Reply

    Great video,I have lots of this brand Mars Hydro highly recommend, the customer service is also great. Good value, well made, saved hundreds.

  9. Ray January 17, 2018 at 9:02 pm - Reply

    Hi everyone !
    I’ve just bought a optic 8 may I ask what you people think of this light
    Many thanks for your time

    • Mary Jane Farmer January 18, 2018 at 3:25 pm

      Well, being as that is not one of the lights we review it would not be fair to comment. But I note that it is relatively expensive compared to other lights that we have reviewed. It is a 500W equivalent light and costs $1399.00 according to the Optic website. Our third most popular light is the Viparspectra 450W equivalent and is currently selling for $179.00. Quite a difference. You can read all our LED Grow Light reviews here.
      Good Karma and Good Growing to you
      MaryJane Farmer

  10. Robert Waymen January 10, 2018 at 9:31 pm - Reply

    All the reviews here are good but I prefer the following Led grow light manufacturer

    advanced led lights
    advanced led
    apollo horticulture
    california light
    mars hydro
    viparspectra reflector
    reflector series
    black dogs
    platinum leds
    k5 xl1000
    reflectorseries 600w

    Thats the order I would pick. I’m currently growing with Advanced Platinum P900 led and and some mars hydro rigs.

  11. Karl E. Hosch January 5, 2018 at 3:00 am - Reply

    So many lights to choose from, what a great site. I noticed you have a lot of indoor grow lights for the home cultivator, but what is the difference between regular lead grow lights and those in a commercial operations. The ones I noticed in commercial operations are more streamlined and are not as intense. Can you tell me if there is a difference and if so, why? Thank you so much!

    • Mary Jane Farmer January 5, 2018 at 10:57 pm

      Somne commercial operations use large HID (high-intensity) lights or fluorescent lights. I amnot sure why but I assume that the difference in price is important to them. That said, the difference in price between LED lights and oteh lights for growing is rapidly diminishing. In addition, because you generally want 30-50 watts per square foot, a very large operation will buy a large number of very large (2000 watts or more) grow lights to cover a larger area with lower cost. A small grower does not need that since one planet is usually one to four square feet of space utimately.
      MaryJane Farmer

    • Karl E. Hosch January 6, 2018 at 5:47 am

      No, they don’t appear to be using fluorescent or HID, they are most definitely LED lights but they are of different styles and sizes. Some are look to be on narrow bars, and some are quite large. I don’t think they use HID especially when they can save a tremendous amount of money in energy costs by using LED’s. If they use them proper like 65 watts or so per plant or per 2.5sf, the yields would be much greater by using LED’s. Anyways, thank you so much for your response. If you come across some industrial type LED’s I’d be interested in hearing about them. PEACE!

  12. Peter December 4, 2017 at 11:55 am - Reply


    I writing from Poland, so

    I saw your comments

    and i want to buy Morsen, but I can not find the Producer adress ( internet site)

    Example, I want to check specifications some lamps of the ,,PAR or PPfd,, , how hight etc.

    Can you help me ?

    Help me please where can I check exact specifications this led lamps

    thank you so much and I hope you will contact to me with answare


    • Mary Jane Farmer December 12, 2017 at 4:41 pm

      Hi Peter. Great to hear from you in Poland. You can find LED Grow Lights from Morsen on Amazon here.
      Let us know how they work for you. Good growing to you.
      MaryJane Farmer

  13. Noman Chaudhry December 1, 2017 at 7:17 am - Reply

    Please help I went with a galaxy hydro 300 w for a 3×3 grow area still trying to figure out light distance. Was to close and the plants didn’t do much for 2 weeks. Now I pulled the light to about 18″-24″ just replanted to 3 gal pots.looking better

    • 420 Beginner December 1, 2017 at 10:18 pm

      Generally speaking, you should start your growing witht he light at 24-36 inches. If you have only 3 plants in 9 square feet and they are still just poking over the soil, then measure up 3 feet from the top of the plant. The plant will grow up to the light and by the time it enters the flowering stage it should be about 18inches below the light. The plant’s desire is for a the right frequencies of light over a long time, not a lot of light that can increase the heat.

    • hello December 5, 2017 at 2:41 pm


    • Noman Chaudhry January 3, 2018 at 12:11 am

      Hey man!

      Thank you soo much just started with my own LED grow lights following your idea and thank you soo much for clearing my misconceptions! Just purchased Roleadro GalaxyHydro Series 300W using link above lets see how it goes 😀 !

      I’ll keep you updated with the progress!

  14. MalandPeter November 18, 2017 at 12:57 pm - Reply

    Mars Hydro Reflector Series LEDs are very unique and have a design unlike others on this list. These lights are full spectrum and have individual reflector cups around each individual diode, increasing the light output significantly and saving you even more electricity than most LED panels. The lights in this series are named in terms of the number of LEDs in the panel, and their true wattage. This is unlike most LEDs that are named for the wattage of the HPS lights that they replace (for example, LEDs called 300W because they are equivalent to 300W HPS although the LEDs use less wattage).

    The four sizes of lights in this series are: 48 LEDs, 102W(equal to 150W HID), 96 LEDs, 207W (equal to 250W HPS), 144 LEDs, 317W (equal to 350W HPS), and 192 LEDs, 410W (equal to 450W HPS).

    Price: $190 to $349 depending on size, with free shipping

  15. Jim November 12, 2017 at 5:27 pm - Reply

    LED lighting is the future. There are so many applications for them.

  16. Joe October 31, 2017 at 9:41 am - Reply

    My LED grow lights are among the brands. Have 2 MEIZHI 600W n now consider buying more. My harvest proved your honest review! I love these lights. Forget to say, I bought from ebay lol the seller is duper nice lol

  17. Alan Christian October 10, 2017 at 8:18 am - Reply

    Mars Hydro rose to the top for me simply because they were forthright in their explanation about Real Wattage vs. Comparative Wattage. Though my light, the 300 watt model, has “300 watts” in the title, it is also made very clear that it’s actual wattage, which is what’s important when using as a grow light, is between 140 and 156 watts.





    • stefan October 26, 2017 at 8:35 am

      Do you have warehouse in Germany I wont pay tax

    • Mary Jane Farmer October 27, 2017 at 4:26 pm

      Sorry. Everything comes from Amazon so I have no way to know if there is a warehouse in Germany or not. If you visited the Amazon link from our site and you were in Germany, then you likely were taken to the German Amazon site
      MaryJane Farmer

  18. Darryl October 8, 2017 at 12:55 am - Reply

    Love the LED grow light comparison chart! The information provided was very informative and a great resource for investing. If you are beginner and looking for cheap way to start check out the Galaxy Hydro. It’s easy to use and inexpensive. Fluorescent lights are also cheap if you want to go that route but LEDs will last longer.

  19. stanimal October 5, 2017 at 8:39 pm - Reply

    Their quantum boards with 3000k, 90 cri are a great place to start

  20. Jonathan Beatty September 14, 2017 at 10:44 am - Reply

    Couldn’t find a fault with the UFO 120 LED Unit Farm,very well built, it was delivered a day early.I’m looking forward to see the results in about 3 months or so, but for now I like it a lot!

    • Mary Jane Farmer September 14, 2017 at 1:52 pm

      Thanks for your comment. If you would like to receive regular updates just hit reply
      Good Karma to you
      MaryJane Farmer

  21. Mark Baxandale September 2, 2017 at 1:14 pm - Reply

    I just started with two of the 450w led mehizi. Can you tell me the best height for the lights and what the max area/ plants can be achieved? I also have 2 4′ fluorescent lights as well as 2 60w standard bulbs but grow lights, Any advice would be greatly appreciated. Thank you for your time and quick response.

    • MaryJane Farmer September 2, 2017 at 2:01 pm

      The recommended height for these lights is 24-30 inches initially, lowering to 18 inches for flowering. Some people have reported using these lights for as many as 4 plants, and our review at says that four plants are acceptable for one light but typically they are used for two plants at most because the coverage area diminishes as the light is moved closer. In addition, if you are training your plants to grow bushy rather than tall, you will want more space between the plants to allow for the light to penetrate the leaf canopy from the sides as well as the top. That assumes that you are growing in a properly reflective environment, like a grow tent. The fluorescent and incandescent bulbs you use provide little additional support and may be quite expensive and even harmful. Good question. Good karma to you.

  22. Scott McIntosh August 5, 2017 at 9:05 pm - Reply

    Hello I have been using the galaxy hydro 300w 9band led lights for about 1 year and for the price they work great in my tent i have 3 of them. The driver forr the fan broke on one of my lights, Does anyone know where to buy parts to fix amazon lights specifically galaxy Hydro. led driver that puts out 12v to power the heat sink fans melted.
    ANYONE KNOW WHERE TO BUY LED LIGHT DRIVERS? Specifically chinese made galaxy hydro or roleadro?
    Thanks for everyones time

  23. Bert Smith August 2, 2017 at 6:38 am - Reply

    Yeah, I tried MEIZHI 450W LED grow light. the spectrum is amazing! I love it, My plants are in vegetative stage, I will buy more in the future!
    And I buy it from ebay, which is not expensive then it is on amazon, here is the like where I bought it and the service there is very great!

    • Mark Baxandale September 2, 2017 at 1:11 pm

      I just started with two of the 450w led mehizi. Can you tell me the best height for the lights and what the max area/ plants can be achieved? I also have 2 4′ fluorescent lights as well as 2 60w standard bulbs but grow lights, Any advice would be greatly appreciated. Thank you for your time and quick response.

  24. abdul July 20, 2017 at 11:16 am - Reply

    Amazing bought LED Lights XML 650 some days ago and my plants are now getting grow very well…. i marked it so i came back to give a good regards.
    Thanks mate

  25. Itsagas July 12, 2017 at 9:27 pm - Reply

    Personally I would only use the advance LED for veg room the led technology has moved From the likes of Chinese rebranded LEDs like kind mars Apollo, do your research folk’s, buy these only if you have a low budget and starting out get the feel of it without costing a fortune on hps, and if you are judging LEDs capabilities with these light’s give up now Go big or Go home lol

  26. Spottero July 4, 2017 at 9:15 am - Reply

    This post made my LED lights decision much easier. Thanks!

  27. Scott June 15, 2017 at 2:43 am - Reply

    Thank you very much for a sterling job! This review has gone beyond my expectations, revealing many factors that were not just new to me.
    It also covered areas that I simply didn’t expect to be included in a “review”.
    it’s so up-to-date with the information too! Many thanks!

  28. GOGREEN June 1, 2017 at 12:25 am - Reply


    I am outfitting a 40ft long x 8ft wide x 10ft tall grow space. Can someone recommend how many of which LED grow light would be best to fill the entire space? Also, any other recommendations would be appreciated on how to get the plants the best light.

  29. Warlock May 28, 2017 at 10:56 am - Reply

    Advice needed
    This is my first grow
    My tent size is 120x120x200 cm.
    With four pots
    So which led shoud i use and how much of watts


    • Dylan June 3, 2017 at 1:17 am

      From what I have researched, it is good to use 60 watts per large plant. I just started my first grow too, and ordered a 150 watt LED light for a few small plants.

  30. Bella Peng March 22, 2017 at 8:16 am - Reply

    We have better light for plant grow,different ratio for different plant.

  31. Steve March 22, 2017 at 4:07 am - Reply

    Anybody heard of Amare Technologis LED?A couple of growers in California said they work really good for them.Any body know anything about Amare Technologies ?

  32. Travis March 15, 2017 at 3:49 pm - Reply

    Advise needed!

    This is my first grow. I have 5 clones, currently all under 12″ tall. My grow tent has not arrived as of yet. The size is 24X24x48.

    Currently I’m using Dual Head Led Grow Light, Ppunson 10W Desk Clip Lamp with 360 Degree Flexible Gooseneck and Double on/off Switch for Indoor Plants Greenhouse Office (10w Dual head) as my light source.

    What would be the best All Purpose (grow/flower) lamp for my setup? I’m interested in LED lights


  33. Maria Belladonna March 7, 2017 at 8:50 am - Reply

    Which is best for flowering only. Any suggestions

    • MalandPeter November 11, 2017 at 10:52 am

      Mars Hydro Mars pro II series is a good choice

  34. King February 9, 2017 at 2:01 am - Reply

    If I want the best led lights, what really are the best for growing. What style of growing usually yeilds more annually? Superauto’s or regular strains. And finally, if using 1000 watt led , how many regular plants is best and how long do I veg. (Ak47ex,white widow ex, critical)before I endure flowering???

    • Ellen February 17, 2017 at 5:59 am

      I started using led growlights ten years ago. The first growlights had only blue and red lights. Today there are several good led growlight:
      – full spectrum colors,
      -the full spectrum cob-chip
      -growlights with full spectrum white light. (below 4000 Kelvin is full spectrum)
      There are good growlights witch are a mixture of 3000K + 3070K
      White leds are intersting to add to a full-spectrum mix; wharm white light and cool white for vegging (6000K) >
      But whitch is the best led growlight? I would say the best growlight is the one with the best results
      I have used many different led growlights; expensive and cheap>
      A very good growlight is the Gainor216. This is, a cheap growlight with consumption of only 55 Watt, I have very good results: 70-75 gram weed (dried and cured)
      more info;

  35. Denial January 17, 2017 at 12:01 pm - Reply

    Hello Admin,

    First I Thanks to you for making such detailed. You helped Us to choose the right LED bulb that will help us to save money for long-term.

  36. Bead January 15, 2017 at 10:30 am - Reply

    3/4 of these lights are not good for growing medication at all. Mars sucks. G8 sucks. Kind..lmfao. they are better then those 2 but are not good. You pay for the remote control. Black dog. Fluence. Those are GREAT LED lights. Advanced are the best ones here for the cost and for vegging I would use the advanced. And I do. The others are crap.

    • Michael January 21, 2017 at 2:27 am

      Check out lushlighting just found them they are not a giant company but they do build there lights mainly for cannabis growers and their knowledge base and customer service are fantastic snd there lights are endorsed by oaksterdam big bud magazine and many others. Check them ouy you will not be dissapointed

  37. Gordon December 9, 2016 at 7:24 pm - Reply

    I’m a beginner and build a small 3.6’X2′ x 5′ grow box. Lined everything with mylar and have intake vents down low and exhaust vents in the top. Also installed a 50CFM exhaust fan in the top just in case. I bought an Advanced Platinum Series P300 series for a grow light. I’m in the process of germinating a few feminized white widow seeds . Once they’ve germinated and planted is 18″ above the best distance for the light and should there be anything between the light and plant like a clear plastic canopy? Thanks for any advice.

  38. peppy davis November 26, 2016 at 11:59 pm - Reply

    i have just recived my cultivation license 1 of 8 need all the help i can get great info

  39. Elise November 25, 2016 at 7:28 pm - Reply

    I am looking at lights for a 12×4 space. I have heard you can Daisy chain the Platinum lights and am wondering if anyone has done well with growing with those LEDs?

    I’m looking to move to the next step, and prefer keeping my utilities to a minimum. Getting flack from friends who believe strongly that LED lights cannot maximize grow. They are sold on High Pressure Sodium, but their equipment (vents, fans, blowers, humidifiers) is way too expensive for my needs, not to mention I could never handle the $300.00 month utilities.

    Anyone with experience with the Platinums? Are your yeilds comparable?

  40. vladimir October 29, 2016 at 4:28 pm - Reply

    hey , what about buying LED ufo and panels from China sellers? BestVa anyone buy china LED advertised as bestva ?

    • peppy davis November 26, 2016 at 11:55 pm

      #$@! china

    • Mr. Big Bud April 27, 2017 at 8:48 am

      MOST, if not all of these lights are just re-branded OEM lights from China. Pass the joint because it’s not working for you 🙂

  41. Puspendu Seth October 24, 2016 at 8:33 am - Reply

    This is a nice post about L.E.D grow light. This light will save electricity of the buyer. So thanks for writing such a beautiful post about L.E.D grow light.

    • 420Beginner November 16, 2016 at 3:52 pm

      Thank you for your kind comment!

  42. Rob October 21, 2016 at 10:42 pm - Reply

    Hi I have a 3×3 x6 grow tent I was thinking Mars 700 watt for 4 plants

    • Tony November 13, 2016 at 4:25 pm

      Too much Watts produce heat in your tent and give your plants light burns. 3x3x6 grow tent does not need that much energy. If you still want that grow lights, do not forget to upgrade your cooling system and hang your lights at appropriate distance.

    • James July 9, 2017 at 2:37 pm

      What about the true watts drawn rather than total Watts of the LEDs? They mention that over at HTG for most lights

  43. ERIC October 20, 2016 at 1:01 am - Reply

    Which is best for just flower. Flower/bloom only. Any suggestions in numerical order.

  44. Amy October 19, 2016 at 9:29 am - Reply

    we are professional led grow light manufacturer since 2009, high quality fair price can be offer for you. Mainly for indoor plant like weed, vegetable growth. We are looking forward to have a chance to cooperate wih you.

    • Shaun April 18, 2017 at 2:53 am

      Send me product guide and price list. I would be willing to sponsor your product in return for a few of your best led light setups. I can take pictures and post results for your products. Please respond to

    • Haley August 2, 2017 at 12:40 pm

      Can us end the guide to me too pls

  45. Kquira September 29, 2016 at 4:54 pm - Reply

    Hi there, i got a 2x4x5 closet and four 12w pot wizard led grow lights very much alike the TaoTronics shown here, will they give my space enough light to grow 2-3 plants to their average good yield capacity or a sea of green in that space how many watts of this type of lamps are needed to yield 16 ounces dry, if with cfls or hid 400 watts(Actual watts) is whats needed to yield 16 in a 2x4x4 space, i know that this lights grow led such as the pot wizard or the tao put out strickly the type light the plant needs not on light the plant wont use, does that justify the little wattage used by these lamps, i mean i would be working with 48w four lamps together 12w each, versus 4 100w cfl? are they gonna perform to that level or how much of this same type grow led i need to equal 400w cfl?

  46. Emma September 27, 2016 at 3:32 am - Reply

    I have tried a Roleadro 400W COB Full Spectrum LED Grow Light which bought on amazon, very nice. The plants grow nice and dense, they love this light. If I had more money I would have two of these in my flower tent, which is 20x36x63. COBs are way.

  47. Susan September 20, 2016 at 7:57 am - Reply

    Hey Bro, can I follow you on FB?

  48. Peach September 14, 2016 at 6:02 am - Reply

    Just curious what you think about the advanced diamond series xml LED 330 watt with the 10 watt cree. I have the platinum p900 and p1200 (platinum) and they are really nice. I did get some bleaching, but I had the them way too close.

  49. Kabir August 13, 2016 at 5:37 pm - Reply

    Very nice and excellent writing ,I have got a lot of information about growing lights.I also like led growing light for aquaponics.

  50. Bill April 8, 2016 at 3:40 pm - Reply

    Big help I went with a galaxy hydro 300 w for a 3×3 grow area still trying to figure out light distance. Was to close and the plants didn’t do much for 2 weeks. Now I pulled the light to about 18″-24″ just replanted to 3 gal pots.looking better

    • kevin April 28, 2016 at 7:41 pm

      Hi Bill, That’s 18 watts per square foot.
      You need a Min of 25 watts per square foot
      I would add 1 more light then you will have 36 watts per sf.
      I use 3 advanced platinum p 300 for a total of 60 watts per sf
      with very good results.
      also start with 24 inches away and try lowering in 2 inch increments every 3 to 4 days till you get to 18 inches. back off light if you see any light burn. there’s a lot of info if you search the internet for reviews and distance of your led light.

    • Dann June 25, 2016 at 4:50 am

      Hi guys, a 3 x 3 (9sqf) would require 225w if its 25w a square foot. So one 300w would be enough. A 4 x 4 (16sqf) -which i think Kevin had in mind, would need the two 300w to Get the 35w a square foot, sorry for butting in yo.

    • Nasty October 20, 2016 at 6:11 pm

      Those panels only pull about 150w from the wall. So it would be less than 20w/sq ft.

    • FACTS September 15, 2017 at 4:26 am

      it’s not about what they pull from the wall. A galaxy 300, galaxy 600 and galaxy 1000 all pull LESS THAN 120 watts from the wall! I have worked with the 600’s and 1000’s and hace a friend that swears by the 300! He gets better results with one 300 over a 4×4 than i do with 2×600 over a 1×4. He’s also been at it a lot longer. his 300 pull only 88 watts from the socket (not 150) plus 3 for the timer but puts out 31,000 Lumens (equal to just over the light put out by a pair of Mini-Sunburst 150w HPS by about 3,000 lumens. my 600’s pull only 98~103 from the wall, but put out 62,800 Lumens each, just under a 600w HPS@66,000. They are labeled by CLOSEST EQUIVALENT OUTPUT HID, NOT POWER DRAW! They are on a passive zener circuit that draws enough to power each chip with the ten watts without using ten watts per chip. NOT ALL THE ENERGY IS CONSUMED, passing some through the chip into the next. Again, It’s about the OUTPUT, not the DRAW. Each chip only actually consumes about 1 watt out the 10 watts it uses to output at full 10 watt capacity as long as 10 watts passes through the chip. The zener circuit is a simple combination of series and parallel circuit using a diode to control the flow along the aluminum panel in one direction only so the chips draw in parallel from the current running in a solo series through the diode(s) and Panel(s). This allows the consumtion wattage to be reduced to as little as 1/10 to 1/2 the actual output wattage.

    • Gary Morris February 11, 2017 at 5:00 pm

      Good morning Kevin,
      Great information and I sincerely appreciate your sharing.
      I am a bit confused as to the values (expressed in watts per sq ft.) Are we talking about watts of LED light rated consumption per sq ft. or estimated conversion of LED output watts as would be expressed in conventional incandescent lights.
      For example a metal halide or high pressure sodium lamps 1000 watt light consumes 1000 watts of energy, vs a LED light which (if I am not mistaken (yet probably am)) of the same potency would consume approximately 25% of the same energy (say 250 watts consumption. So my question is are your above expressed minimum 25 watts per square foot based on LED watt consumption or??
      I would appreciate your input. Sorry if this seems a dumb question.
      All the best,

    • FACTS September 15, 2017 at 4:54 am

      Rated Output. Consumption, as stated above has no reflection on output. A 45 watt LED panel is not listed for it’s consumption, but rather the accepted value of OUTPUT, and thus equal to using a 45 watt purple/red/blue CFL bulb/combo, and only draws about 5 watts off the wall. The Galaxy Hydro 300 only consumes ~85 watts, give or take. Either one of my Galaxy Hydro 600’s puts out twice the lumens (`62,800), of my 6xT5HO (peaking @30,000 even 6″ from reflector with all six on), yet draws 1/3 the power. The 25 watts per square foot is a rule of thumb predating HID’s (Bringing the consumption on MH and HPS down to 75% of original values with little impact on Lumens) If you go by 25W CONSUMPTION per sqyare foot with LEDs or HIDs, you are going to be looking at some severely light burned plants…. Most likely the reason i’m getting sub-par yields from my 2x GH600 over 1×4 vs my buddy with his single GH300 over a 4×4. Proportionally, my total yield is roughly just under half his total from 1/4 the space. but it’s also not as high quality. THERE IS SUCH A THING AS TOO MUCH LIGHT! You want to match your lighting to your space by 25W OUTPUT per square foot but no more than 70w OUTPUT per square foot. It’s really about Lumuns per square foot (uMol in metric). Ed Rosenthal explains it a lot better in his book than I possibly could (2010 being the newest Edition). Go get yourself a copy at Barnes & Noble or from a friend with the PDF, Just don’t get it any way that puts your name and address on the “Watch List” (definitely not your Grow Address if it’s at home in your closet/spare room/basement/attic/etc…). Ed’s book is THE only comprehensive guide to indoor gardening of any kind, not to mention the course material in the University of California.

    • Randy M September 24, 2017 at 10:36 pm

      This is a great, comprehensive list. I would add in that while “Watts” is a useful measure that we are accustomed to with incandescent lighting, it is important to understand that we are talking about photons with plants, and that depending on the spectrum, the difference between lumens and PPF can be critical as well. There is too much misinformation and confusion out there. There is a guide over at indoor hydroponics that has a good explanation of all this:

    • FACTS September 15, 2017 at 5:21 am

      Proper Hight of lighting is indicated by full coverage of your canopy area. Raise the light until it covers your 3×3 or 4×4 area at soil level (top of planting container height). You can continue to raise it to keep full profile of your top canopy, or alternatively let the plants grow up to the light’s critical zone adding square footage to the sides of your canopy. Regardless of plant (Mary-Jane, tomatoes, potatoes, peppers, etc.), all growth comes from your Growing Tips, which are not limited to your upper canopy. The more healthy Foliage you maintain, the higher your yield will be. Your canopy is not just the flat surface at the upper reaches of the plant, it is as 3-dimensional as your plant. a plant that is 2′ across the base and 3 ‘ tall would be figured for canopy area as the healthiest part of the whole cone, not the 2×2 base. This gives it roughly 7~8 square feet of canopy ( rough math, purely estimated), and would require 400~500 watts (50-60 watts/sq ft) for optimal production output, where as the 2×2 only requires about 200w (~25 watts/sq ft of fore mentioned plant) for optimal growth of 4 square foot total. Ideally, it’s about total sq ft of full canopy (top AND sides (all growth exposed to light) for ~1g/watt with MJ), but the total sq ft of your space suffices for minimal yield (1/4g/watt with MJ).

    • shirley May 11, 2018 at 1:43 am

      Hi, My name is Shirley, we are the professional LED Grow Light manufacture from China, our brand is JCBritw. Recently we released a new 30W LED Grow Light full spectrum with UV& IR lamps, we need some testing, do you interested ?
      Please send email to, or you can catch me on Face Book by search: JCBritw Hope to hear from you soon

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