OK, I'll weigh in on this now. I began growing indoors (in tents) for the first time in July 2021. Photos and autoflowers. I researched ALL kinds of lights and manufacturers and prices. I settled on Sonofarm for a variety of reasons, mainly price per watt, 5 year warranty, customer service and good reviews from other growers. I currently have 4 x 4000K and a single 2000K. I run all 4 4000K in a 4 x 8 x 80" tent and the 2000k in a 4 x 2 x 48" tent. ALL 5 lights measure within 6 watts of advertised wattage at the outlet.
I am now beginning grow #5. I am MORE than pleased with Sonofarm lights. I have more bud than I've ever had and I have given away to friends and family more than I ever imagined I would. I've run all types of indica, sativa and hybrids - and photos and autos. They have all surprised me in all aspects of production. I grow in Coast of Maine Stonington Blend or Bar Harbor soils and use organic or Jacks fertilizers in 3,5,7 and 10 gallon cloth bags.
I an IN NO WAY associated with Sonofarm and am only reviewing my views on there product. I WILL continue to buy their LED lights!