I got a 10x10 room I use a wood tent I made 6 feet by 3 gunna be 7 by 3 and I fit 18 ..13 litre pots in there run 1280 watts it's a sea of green type grow I use 3 lights all hps I'm just starting ..... My buddy's run one hps with md like 6 hps and 6 md and they yield 25 pounds dry there...