dizwhatitis
Well-Known Member
oh i missed the reply about odor controll. oops
general rule of thumb with lighting is put your hand at the tops of the plants and if your hand is burning, so will your plants. normly hps need to be a foot off the plants but with my 150w hps i found 8" to be comfortable for my babies. The guy at my local hydro store had his 150w hps only 6 inches off his plants.and once the babys are more grown up how far should hps be away from the plants?
6-8 inches? 12"?