my room is 6x8, I had 2 t5 8 bulb lights,clone to flower, i use a home made dwc system that have 8 plants per tub, one tub per light,ive been doing this setup for a 1.5 years but never got those buds i see every where so i bought a 600hps with light mover,the highest yield was 6 ounces every harvest, this harvest was 8 ounces, nice tight nugs even had to tie up the buds for they wouldnt break the stem never had that with the t5s....