So i'm in the process of setting up a 29g, i have plenty of clamp lights around so i was hoping to just have an open top and use some clamps to light it. I've seen other people do this so hopefully it's an acceptable method and will work well. Now the big question is how much? 2 lights or 3? 6500k seems to be the way to go, but what watts? 23 CFL is supposed to be equal to 100wat incandescent, so would 2 of them be under 2 watts per gallon or well over it? Any advises?