I've got some young ladies veggin out now, about to go into a new flower room of all EndoMaxx Ceramic Metal Halide's 315w. I've got a 3 row x 5 column layout with each light covering a 2.5 sqft floor space. The entire room is going to draw slightly less than 6500w including the filter fans to cover this 12.5x9 (112sqft) area. its a sub-grade finished basement that likes to stay around 40 degrees, year round, so this will maybe need a 12kBTU portable a/c at some point... maybe... the rest of the house has central air and it tends to fall down there in the summer, so again, maybe..... EndoMax offered to upgrade my hoods for free, so I dropped them off today and I'll post pics when I hang everything back up and then begin filling the room in a couple days.