I have a grow box with the dimensions being: H 5' W 2'6" D 1'7" I have two seedlings inside, with (2) 42 watts on total. (One per plant). I know the general rule is 150 watts for the first and 50 watts for each additional plant. But I want some really nice bushy plants so I intended to use as much as I can. Would (12) 42 watts be too much for this size grow box and for just two plants? If so what would be the sufficient amount of lighting? I don't want the minimum!
The 42 watt cfl's work good,. 20 would be better than 12.. Run them 1.5" away and keep a good airflow going ...