In that case keep your light around 12-18" from the tops of the plants.

Get that fan in there ASAP, you have to have good circulation, especially with a 600W system! :rasta:

You wouldn't happen to have a digital ballast, would you? If you could switch to Metal Halide it would be better for vegging.
Faddenator Reviewed by Faddenator on . My 1st grow. A few Q's Hello! I'm new to the site and new to growing so ive got a few questions, I've got 6 AK47 seeds that ive put in Rockwool cubes to germinate. I soaked the cubes in water for a few hours, the squeezed them a tiny bit to get rid of the excess water and put them in a propagator in a dark room at 80-90f. Ive just checked them this morning about 65 hours after i put them in and there are tiny roots sticking out the bottom of 3 fo them but nothing from the other 3 and no sign of anythin coming out of Rating: 5