hi, v in my experiece i've only been able to get 5-6 plants max outa 400watters thats y i got my new 1000watter 14-18 plants max so i would say about 4 or 5 is a good estemit for u!

peace out!
the joint meister Reviewed by the joint meister on . EXpert Help please~~~~~~ howmany plants can i grow under a 400w hps with maybe 1 or 2 cfls and foil on the walls ? white widow white rhino big bud i just need a total number please:rasta: Rating: 5