Hey man, If you can, I'd get the GV 26w 2700K 3 pack of CFL's for under $6. There some of the MOST eficient CFL's out there. If you look in my sig, there's a link to some CFL info. Maybe what your lookin for, maybe not. But the 'average' is about 100 actual watts per plant/SqFt of grow space.Haha well looks like I'm headdin to home depot to get some more cfls... What wattage bulb would be best to get?