I cant remember if i sent this updated Review but here goes. Jan 22 2021Now... I have 6 of these panels 1 series 600, 4 1200s...the one 1500 series This panel is awsome!!I will be retrofitting my room to all 1500 series panels next season.These are all a simple hang plug and done. Ready to be added to any timer.The LEDs on the panel stay cooler are all brighter tighter warmer and have well thought out progressive LED designs...all backed up by Exlenvce Support team actions...not talk.I have to tell this story.My one experience after 3+ years the customer service was really impressive.One of my 1200 series after 3 years blinked sometimes.I sent one Email to ask for advise from support.Support replied back to me the same day...the same day!!!!No stupid redundant questionsNo time wasting tactics.No bs!!!...Just plan old fashioned"take care of the customer first" mentality.My heart smiled.I am a fan of real customer support.Exlenvce has impressive old school values you will not find often...Or at all these days... in any service.That one fundamental value forced me to write this very very rare second opinion\review.I used to be the person that says"if it works well you buy more" and recommend it to friends that grow inside. They all have a few now i cant keep track.These panels are tough well built quality controlled units and I as a consumer am very impressed.This light panel was replaced assisted by Susan from the support team at Exlenvce in 4 days...4 days!!!.Beat that Bosily!!!I daisy chain 3... and 3 more on a strip with one cord to the wall.All are up on and running as they have for 4+ years.Thats it... thats all i have to say hereMAG is still happy in Napa CAOriginal review:These are the best led panels i have used in 10 years of buying from other dealers.I now have 3 of these 2 1200 n 1 1500 series panels over my indoor garden and my plants are very happy to be under your very well built led grow light design.Thank you for buiding a great light system.I do recommend the Exlenvce name product with confidence over any other named brands made of inferior materials and use untrained quality control on products going out the door.Exlenvce quality control and customer service is excellent.They simply test the product again before it goes out the door and then they email and or call to make sure it showed up in perfect working order and you are happy with your choice.What a great concept other businesses should follow.Pay attention out there. The value of this panel is more than advertised.Get two while you can. I have 3 going on 4 soon while they are still in stock this year.You will not regret this purchase.It will pay for itself...or 4 ?, in one season. My 3 did just that.One panel will blow your mind by seeing the rapid plant growth alone. Buy a second panel just because it works better and last longer than any other light panel on the marketNo bot no bs. Just the facts as I witessed with my own two eyes.Happy harvest!MAG... is just another one of meny very satisfied growers using your 1200 1500 watt light panels in Napa CA.P.S. I have been so impressively stunned by this model...the quality and effectiveness on my garden has compelled me to type this very rare opinion.You earned it.Thank you to all the employees at Exlenvce during this worldwide pandemic.You are all very brave or very crazy to service us all without delay...The new normal.These are actually, surprisingly good lights.I was very leery of the horror stories I read about lights failing after short period of time, and sure enough, one of mine started to fail after 2 months, But, all was not lost.I've been growing marijuana for over 40 years, so I have some experience, and have been growing inside since 2008.HPS was my choice, but the heat and cost was getting to me, so I made the leap to L.E.D.I'm a graduate of Oaksterdam University so I take careful notes of my grows, here is what I found that worked for me, remember I tested these lights under several species of plants, but my main focus was Marijuana.I had 3 strains, Romulan, Blackjack, and Fire OG.also several orchids, asparagus, avocado seed, cilantro and parsley.I set the lights about 12 inches away on Veg light only for about a month. Then turned both lights on, what a difference. using Veg and Bloom channels at the same time grew my marijane very fast. no immediate effect on other plants.After 2 months I decide to bloom my plants. About 4th week Veg chan. started to die. Half when out and a week later the whole blue light channel was gone!!I had just bought 2nd light one week before!and yes, if you are growing in a 4'x4' grow area I'd recommend 2 lights.Because of previous horror stories about problematic returns, and because of where I was in growth cycle, I adjusted my garden to where the Romulan got full veg and bloom channels and the fire og , Blackjack got just Bloom/red channel, and I did nothing elses til grow wqas done because at this point the scientist in me took over and I decided to see what would happen to size and potency.So, I'm still processing my "stuff", but preliminary results are showing that under just Bloom/red channel my buds are big beefy, and it almost seems that resin production was unaffected by lack of Blue/Veg light.So in summary, these lights work GREAT!You do have to exceed manufacturers recommendation of 18"-24"Mine at Veg stage , light was 6 to 8 inches away. I had no photon damage to plant(burning of leaves)Once flowering was induced, I did have to move the lights up to 12 inches away.The colas where becoming so heavy they bent the branches over, which actually helped the 2 plants under red/bloom light only. Where as my Romulan seemed to be more sensitive, so I moved the light to 18 inches away.So after finishing my flowers off, time to return product.Did you know you need to register with the company to effect warranty?So my experience was amazingly smooth and if I had known ahead of time that they would send replacement ASAP, I would have evoked the warranty much sooner. The very gentle lady I worked with for the return, Susan, was most pleasant to interact with. All I had to do was send photo of faulty light!So, in summary, these lights are highly effective(at least for the 3 strains I grew)Very economical compared to my HPS (HPS $175 a month versus $25 for LED)And yeah, the lights VEG channel died,BUT replacement is fast and easy AND it's a 4 year warranty!!I am extremely happy with the company and it's product......Or maybe it's the killer "Happy Smoke" I grew!!!LOL5 stars!!!@@##$I had multiple 1200 lights stop working on the VEG setting in under 2 years with light use. The seller sent replacements and even upgraded one to the 1500 model. They work great and provided amazing results.