Roleadro GalaxyHydro 300W LED Grow Light Review

Roleadro GalaxyHydro 300W LED Grow Light Review

By |2018-10-26T04:34:01+00:00January 26th, 2018|LED Grow Lights|22 Comments

[UPDATED] Things are going well on this end. We really appreciate all the interesting comments and questions we get from you and truth to tell, we never really thought we were getting such a large readership. Anyway, we’ve gotten a lot of questions lately about the significance of red and blue lights in the hydroponic plant grow lamps, so we wanted to go over this importance and explain why having a lamp like the Roleadro GalaxyHydro 300W LED Grow Light might be a good idea for your indoor growing.

The Importance of Red and Blue LED light

Hydro culture studies now show that red and blue LED light offers more effective plant and development growth for indoor hydroponics and that this light spectra and intensity when controlled by a grower can make marijuana plants sturdier, greener and overall, more proficient. Which is why growers are increasingly using LED lights for hydroponic growing.

Roleadro GalaxyHydro 300 Watt LED Grow Light: The Specs

The Roleadro Galaxy Hydro Series 300W LED Grow Light full spectrum hydroponic plant grow lamp meets many of these needs.


Roleadro Galaxyhydro 300 Watt LED Grow Light for hydroponics

This is a lamp that is made with more red and blue light than white; which means that if you notice your plants just don’t seem as bright-eyed and bushy tailed as you would want them, you might want to consider using this lamp instead of those that have more white light. It’s also got some decent PAR values for the money—brightness on a budget.

PAR values for Roleadro Galaxyhydro 300W LED grow light for cannabis

Roleadro Galaxyhydro 300W LED Grow Light coverage and PAR values

This lamp is well built and considerably sturdier than many on the market. It weighs about 7.6 pounds and measures 15.8″ x 8.3″ x 2.4″. At a very affordable price, it offers a lot of get up and go, as it has a 2 year warranty and a zero maintenance cost.

The high power Epiled 3W chips allow for energy saving but a high brightness and IR (infrared) glow that your plants need. This offers the best ratio of red and blue light which improves the growth speed of your marijuana.

But best of all it also includes IR functionality for even more output.

The benefits:

  • IR for better photosynthesis
  • More red and blue light chips than white
  • Sturdy build
  • High brightness
  • Low power consumption
  • Integrated fans to lower heat consumption
  • Daisy chain more than one unit together
  • 300W HID equivalent—but actual power consumption of around 140W
  • One of the best 300W LED grow lights on the market for the money

The lamp also offers 90 and 120 degree view angles, allowing you to adjust according to the placement of your plants, and although seeing the IR lights with your naked eye is a bit tough, don’t think they aren’t working. These are important and play an important role in the flowering and seeding stage of your cannabis plants.

You’ll want to keep your lights on for 10 to 16 hours a day and change the height to between 12 to 56 inches depending on the different growing stages of the plant.

Bottom Line

Buy this light if you’ve got a smallish grow area, 2′ x 2′ for flowering and 3′ x 3′ for veg stage (and if you know about plant training, you’ll get even better results). Excellent light for indoor growers on a tight budget.

For the price, the Galaxy Hydro 300W grow lamp offers that needed brightness boost for your hemp plants. The red and blue intensity can really make those leaves green and give your plant the needed flavor to make your bud crop outstanding. The frame is sturdy and ready to plug in. We find the cord long enough to reach most power outlets and the easy clip on feature is great because you can change the lamp to different sections when you need to.

A fully dimmable model is also available, if you prefer dimming the brightness to changing the hanging height.

Looking for more LED grow light options? The latest and highest rated lights for growing weed indoors? Check out our roundup review of the best LED grow lights on the market.

About the Author:

MaryJane Farmer is the nom de plume of the writers for 420Beginner and the avatar for our brand (kind of like the Betty Crocker of Weed.)


  1. Willowshes August 24, 2018 at 2:58 pm - Reply

    Is this mandatorily for hydroponic grows? Would they work the same on soil grows? I appreciate the info!

    • Mary Jane Farmer September 4, 2018 at 7:23 am

      Yep, they’re for soil grows too. A lot of companies call their lights hydroponic lights, but they’ll work for any kind of indoor growing.

  2. Chew420 March 26, 2018 at 8:34 pm - Reply

    I’m running a 300 watt Roleadro galaxyhydro right next to a optic 1 cree cxb 3590 and a meizhi 600 on opposite sides in a tent. There is a pure kush under the roleadro and it is doing amazing best plant in the tent with most trics fastest colas. It loves the spectrum strong red like 66nm and mix of side spectrums just killing it. I’m planning going all cree cxb cobs or quantum board for next grow but I plan on running my roleadro GH with it that spectrum mixed with cobs or quantum board deff can’t go wrong two grows for me now each plant under roleadro killed it

    • Mary Jane Farmer March 28, 2018 at 5:42 pm

      Thanks, Chew420! We love info like this.

      In fact, if you ever fancy putting together a grow journal or something like that, drop us a line (maryjanefarmer[at] We’d love to get a few articles like that on here – the gear people use, the results they’re getting.

  3. Edu March 26, 2018 at 7:46 am - Reply

    hey moderators,

    manufacturer has already responded my doubts. They’re both the same, the one with the roleadro sticker is the EU version while the one with the GalaxyHydro sticker is the US version.

    thanks ayways

    • Mary Jane Farmer March 28, 2018 at 5:34 pm

      Thanks for letting us know, Edu!

      Sorry we didn’t reply sooner. Got a bit behind with the comment moderating… Just catching up now!

      But yep, both lights are the same.

  4. Edu March 25, 2018 at 8:03 am - Reply


    first of all, thank you for this review. I’m really interested in using this led lap by roleadro. Problem is here in Spain I can only find a very similar version of this lamp, yet not the same. Reading its specs in the roleadro official website they look exactly the same, the one I can find has a “Roleadro” sticker instead of the “GalaxyHydro” sticker. What are the differences between them? I’m kind of lost.

    thanks in advanced

    • Will January 8, 2019 at 2:16 pm

      Rileadro bought out galaxyhydro. So they still have similar lights, but under the new name. I’m not sure if they produce the 300w anymore, but they have a 1000w that is really affordable. Would love to hear some info on it.

  5. Gabe August 29, 2017 at 4:00 am - Reply

    I just picked up the galaxy300. I’m exited being this is my first attempt at doing it myself. I’m trying a GG4 bag seed that I’ve already got sprouted. More plants would up my odds of a female. Any advice would be awesome. My dream is to be a master grower. I’m on step one of the journey.

    • Mary Jane Farmer September 2, 2017 at 3:16 pm

      Hi Gabe. Good karma to you in your quest. We will be publishing a guide to seed companies in a few days, but as a starter, let me suggest that you might want to start with a company that provides fully feminized seeds. Alternatively, you will want to definitely inspect your plants and make sure you eliminate the males (good riddance!!) before pollination occurs. There are a number of reasons that starting with fully feminized seeds is preferable. Here are a few of them from our Growing Guide: “High humidity helps in increasing the growth rate of female plants while low humidity is good for the growth of male. Same is the case observed with the temperature that the low temperature is helpful for female plants’ growth while high temperature is good for male plants. As far as the lighting is concerned then blue spectrum light energy boosts up the growth rate of female plants and red spectrum light benefits male ones. Moreover the low nitrogen level is good for female plants while high level or nitrogen produces and nourishes male plants efficiently. You will have to keep the potassium level low for encouraging the growth of female plants and vice versa for male plants.”

      When the plants are past the seedling stage, look for a small structure like a penis at the junction of the stem. Females will have “balls” that look like balls.

      How to tell the difference

      A penis will indicate a male plant. How surprising!! Slay it before it fertilizes the female if you want more potent weed.
      Good growing to you and good karma.
      MaryJane Farmer

  6. C August 7, 2017 at 1:55 pm - Reply

    I would like to know as well. I have two of these

  7. Wesgrow July 27, 2017 at 7:36 pm - Reply

    Will the galaxy hydro 300 watt be good to grow my plant all the way to flower ing or would I need to put a red ufo in there to

    • Wesgrow July 27, 2017 at 7:42 pm

      The one on Amazon for $79.99 with two fans on top

  8. Paul July 16, 2017 at 11:11 pm - Reply

    I’ve been using one of these for 2 years in a 2’x3’x5′ space. I have passive intake venting into my attic and a small circulation fan. I keep it 24″ to 18″ above for veg and when I switch to flowering the stretch brings my canopy to 12″ to 10″ below. Temps stay between 75-81 in summer 68-78 in winter. This light is very bright and I’ve had zero problems with it.

  9. Gilbert April 30, 2017 at 12:10 am - Reply

    the globalstar 300w lamp provides 150w in each mode… right? and 300w in full mode? … do you have any idea about the lumens that produce in bloom mode? I dont know yet about getting this one or the Galaxy Hydro 300… I need to maxime the production of a 5 sq ft indoor. What would you recommend?

    • Sideshow July 11, 2017 at 10:41 pm

      These draw actual wattage at about 130-140ish total. There are no modes, on or off, thats it. Its a “300w” equivalent replacement, meaning its supposed to be as effective as a 300w bulb.

  10. Jesse December 14, 2016 at 7:37 am - Reply

    I’m thinking about doing a grow with about 6-8 plants in a 7′ by 6′ grow space I was wondering if 2 of these 300w galaxy hydro led’s would be enough light to cover that space and plants

    • Sideshow July 11, 2017 at 10:39 pm

      Two of these lights without vent fan will send a 3×3 tent to over 100degrees F

    • Sideshow July 11, 2017 at 10:43 pm

      Sorry, hit wrong reply button.

      These lights are good for about a 24″ square space at 36″ above, higher then that, light penetrates less.

  11. John November 9, 2016 at 11:39 pm - Reply

    Cali’s new 6 plant rule has me wanting to have a small indoor Scrog grow: tent, LED lights and hydroponic resovoir. I was considering 1 or 2 plants in a 3×3 tent under either a pair of Galaxyhydro 300 W lights or a single 600 W LED light fixture. My question is that I’m unsure which light setup would work best considering a slight cost increase for the pair and factors like power usage, heat, lens directionality and more. I like the idea of using a pair should one fail and more flexibility in placement. The lens directionality baffles me. Also, does the 600 W fixture penetrate a Scrog grow better than a pair of 300 W units? Since a 3×3 tent is taller than many rectangular ones having approximately the same grow area, would heat be a factor in my decision? Can you advise? Thanks.

    • 420Beginner November 16, 2016 at 4:11 pm

      Hi John,
      Congratulations and happy growing!
      LED lights don’t generate much heat at all. That’s nice for scrogging since they don’t burn.
      When it says something like 90-degree lens or view angle, it just means the light comes straight down. 120-degrees and the light angles out more (like the Galaxy Hydro 300W). Just one 300W is enough for a 3×3 space.
      If you buy a good-quality light, you shouldn’t have to worry about failure, not for a long time (although crap happens).

    • Sideshow July 11, 2017 at 10:45 pm

      Two of these lights without vent fan will send a 3×3 tent to over 100degrees F

      And only one in that space, 3×3 is minimum… two gives best lighting for that size, as these lights are only about 140w actual draw..

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