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420 Beginner – Your One Stop Guide to Growing Perfect Marijuana

420Beginner is your number 1 go to resource for information and advice on every aspect of growing marijuana. If this is your first time you will find everything you need to know, from our seed buying and set up guides, to grow lights and  professional tips will ensure a successful crop.

If you are already growing your plants our up to the minute articles on grow lights, techniques and latest tools and will enable you to achieve the best possible results.

Best LED Grow Lights 2019

Up to the minute report for 2019

Best LED Grow Lights Under $100

Ideal for small growing areas or hobby grower

Best 1000w LED Grow Lights for Growing Cannabis

Here we take a look at the best 1000w grow lights for those with a higher demand

Best T5 Grow Lights (That's fluorescent grow lights)

Indoor growers appreciate T5 grow lights because they are less expensive than LEDs and they run cool

Guide to Buying Marijuana Seeds

All You Need to Know About Cannabis Seeds

How to Grow Weed Indoors

Getting Started Growing Cannabis

Planning Your Indoor Cannabis Grow

Choose your cannabis strain

Best Practices for Greenhouse Hemp

A greenhouse is discrete and cost-effective for growing hemp in quantity.

Recent Posts

Recent Comments



  1. Gregoire gok expert September 25, 2019 at 4:11 am - Reply

    Great read, thanks a lot!

  2. Paul September 3, 2019 at 6:51 am - Reply

    Even though I’m not the biggest fan of cannabis, I love it since it helps my aunt recovering a lot. The oils created from this are really rejuvenating.

  3. Edward July 9, 2019 at 11:33 pm - Reply

    Hi,this is Edward ,your page is great,and i want buy a marshydro TS-1000, and i knew many friends also want buy this kind of light.Can you get a review about this new series of marshydro?Thanks

    • Adrian Head July 14, 2019 at 11:39 am

      Hi Edward
      Thanks for the comment. We are reaching out to Marshydro but if you are interested in purchasing one of these and have friends also looking to do so please let me know and we may well be able to get a bulk order discount for you. Drop me a line at hello@northerncaribllc.com with some more details and I will get back to you.

  4. Dr Nathalia J. June 20, 2019 at 8:20 am - Reply

    Great guides for beginners!

  5. Jason April 11, 2019 at 4:21 pm - Reply

    I’m a beginner and start buying all the required pieces of equipment to start to grow. I bought the new SolarXtreme 250 from California light works and it seems working well, there is another option to go with their SolarSystem that has an adjustable spectrum feature using their SolarSystem controller. any thought or tip for using adjustable spectrum LED lights?
    Another question is regarding California Lightworks products, SolarSystem 1100 and 1100 UVB. Do you have any thoughts on these products? I read that using UVB lights will boost the growing process.

  6. Bob March 28, 2019 at 11:25 am - Reply

    All of these LED’s will work find to grow cannabis, but if you’re doing an article on the “best” LED fixtures available for horticulture the list should go something like this:

    P.L. Light
    Philips Greenpower

    PL, Fluence, and Philips are the most efficient fixtures, running from 2.7-3.0 umol/Joule. All of these brands have CE and UL certifications and also IP67 ratings for wet environments. Prices are high but about the same as HLG fixtures.

  7. Cannabis Profit Tips - Big Buds Guide January 12, 2019 at 12:16 pm - Reply

    […] in the future, but take note of his interest in researching LED Grow Lights.  We know where the best LED Grow Lights can be found at the best prices, so check out our reviews […]

  8. 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.

  9. 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!

  10. 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 maryjanefarmer@420beginner.com we’ll take a look and get back to you.

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

    To save power with low wattage LED grow light, just visit the website: http://www.jcbritw.com

  12. 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

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

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

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

    Thanks for your Nice Post

  15. 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. https://goo.gl/eoohtc

  16. 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

  17. 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.

  18. 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!

  19. 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

  20. 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!

  21. 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

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

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

  23. 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 lolhttps://www.ebay.com/itm/MEIZHI-600W-LED-Grow-Light-Full-Spectrum-Indoor-Hydropoloics-Veg-Bloom-Switches-/122418845692 the seller is duper nice lol

  24. 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 watt