L
lysol
to answer the thread literally, 1" by 1" cola could grow under a 600w as long as you can raise the lights, but you'd be wasting 2' 11" x 2' 11" worth of light, robbing you of your gpw yield. I got 2' by 3' of space under my 600w only 2 plants flowering now, temps are fine 77F 8" away in a 75F room, using a centrifugal turned all the way down