Don't tryn get greedy = it'll hurt your yields .
I do 2 buckets per 1000w. hps. and can get a lb. per bucket pretty easily .
I've never owned a 400w. myself . Are you using clones ? Size of room ? Any past experiences ?
Peace
Crispi :stoned:
xcrispi Reviewed by xcrispi on . Buckets Per Light? A quick question for those who know. When growing DWC in 5 gal buckets....How many buckets is a good idea to use per 400w HPS light? Rating: 5