alrite dude see your starting a grow good luck to ya mate..tips if using cfls keep light close as possible.theses bulbs dont heat so dont worry bout burning.if using nutrients use half strength...i just nearly lost 10 plants due to nute burns,now im behind on growth..& and half weeks into veg and plants have stopped due to damage....... but weed is a strong plant and will return..so tomorrow its time to switch to 12/12 and watch my babies grow.. if i was you id try using HPS bulbs for flower stage as dose a better job...and Q's just ask dude !!