Horticulture Lighting Group HLG 100 V2 4000K Quantum Board LED Grow Easily Veg & Bloom | Version 2 Highly Efficient Upgraded Samsung LM301B LEDs

I've read reviews on this LED Light complaining about heat!! If I would have gone just by those reviews (aka: complaints), I would have passed on ordering this LED Light!! Well, I decided to try it based on visual observation. I am thrown completely off as to why some people say this light produces too much heat? Compared to my big green 3 fan LED Light, this LED light is unbelievably cool. My big green LED produced so much heat, even though I kept the door closed, my air conditioner stayed on. Since this excessive heat is a problem for us (for anyone really) I had to find a solution. This LED Light is surprisingly cool. It has no fans to dissipate heat because it doesn't produce enough heat to make it necessary!! Such little heat is produced, I've decided this is going to be my big money saving solution and plan to order several more to fully compliment my small grow needs. With this solving my excessive heat issues from older units, heat problems simply just go away!! PROs: Very bright like sunlight! Not very heavy and easy to put in place. Small footprint and excellent performance. All LEDs are lit and working. The difference between my old big green, 3 fan heat monster and this, is like night and day!! Cons: Since there's so little heat, I'd like a bigger unit (longer & wider) for more coverage for the money!! Requires careful handle so as to not damage the power connector which is exposed and vulnerable. This review is based on short term use. Long term use report will come with time, of course! Once in place, these only need to be moved up or down as you may require!! Three of these LED Lights should cover a 5' by 5' area or larger if placed correctly. I plan on using two of these for a 2' x 4' area resting assured two will be more than enough. From what I am able to tell, the 4000K spectrum are best to promote vegetative growth and the 3000K will promote better flowering. Given this information, I would imagine deploying one of each, for my needs, should take care of a full cycle. If I never post a follow-up due to failed performance or disappointing results of any kind, you can be sure it is still up and running. The first day of setup was on 4/20/19. I hope this helps with any concerns you might have.

Its seems brighter than my 315 cmh. Using it as a vegg light in a 5x5 space. The heatsink on the light itself gets pretty hot, but the light doesn't add much heat to the space. Nothing close to what the cmh light did. Its a little pricey though. Only reason I got this light it because I am running out of usable watts in my house and that like is 100+ watts less to run than my 315 cmh.

This light is significantly brighter than expected. The white light took my rooted clones and tripled them in size in 2 weeks. I'm not a fan of Leds for many reasons, but this little light is perfect for mother plants and vegetative plants. I've been using different grow lights for 18 years, and this is the closest vegetative light to a 250 watt metal halide.

I was using a "burple" LED light on my plants and the increase in growth and foliage improved dramatically when that light was replaced by this quantum board light. Plant growth was apparent on a daily basis and almost equal to full sunlight. I put the plants in the sun during the day and under this light at night (and during days with poor sunlight) and the growth appears to be the same. This light is also a vast improvement over another LED lamp I used last year, promoting lusher and faster growth. The coverage is at least the 3' x 3' advertised for the vegetative period and 2' x 2' for flowering. I would be comfortable using the 3' x 3' area even for flowering. I have ZERO heat issues (some people complained about the heat). I can easily pick up the transformer without any heat discomfort. I mounted the power transformer on the board, as designed, at first and then mounted the transformer off of the board. There is slightly more heat with the transformer mounted to the board, but not enough to be of any concern. The best light I have used to date and certainly well worth the price. I will be buying another soon to get ready for the winter crop.

Can’t return the light to Amazon or HLG. Light will no longer power on.