Just to add...If you are not useing at least a 4 bulb fixture, most will not have seperate actinic/daylight controls. If you don't have tons of bulbs w/high lighting I will agree with ace, I don't think the seperate light timers is that big of a deal. I'm running 6 t5 bulbs and wouldn't want to turn them all on at once, I might blind the pour fish. Just my opinion, Stephen