A hair over 1500 watts per tent. I use 32 COB's per tent with active heat sinks also so my efficiency is up there... I am thinking of building some lights that can shine from below in between the rows of plants so help at weight to lowers, but I'm also working on my canopy management so that will be helping as well. My highest yielder right now is LSD. The top colas are always big. I let this last run stretch way to much and there weren't any large cola's on any plants except the LSD, This LSD has it all, size, potency, smell, bag appeal, I can't find anything to replace it with. I had a whole tent with just LSD but I left the pump unplugged and they died, luckily I was only in 2-3 weeks of veg, I guarantee I can pull 6lbs with just LSD in the tent...