As popular opinion has it, hps lights make denser potent nuggs than flos. so i can see how having so many lights may be retarted as you guys say. If your going that big, 450 watts, pick up a 400 watt hps and have your self some reall power and simplicity. Cfls do work though. There a great start for newbs, they dont have as many safety concerns such as heat and whatnot.