I think I've heard some people around here saw like a minimum of 3 bulbs or something- I think that's hogwash. LOL.. Put as many cfls in there as ya can.. for vegging the amount of light isn't AS important- the distance of the light is more important.. also, the plant need a LOT less lumens during vegging opposed to flowering, so for most cfl growers, growth will seem fine- yet flowering is usually a disappointment. In Jorge's bible, he says that the maximum usable light during vegging is about 17,000 lumens- where as the most light it can use during flowering is well over 100,000 lumens... you don't NEED that much, but that is OpTiMaL. Just wanted you to see exactly why cfls are harder to grow with... get as many bulbs as you can. LOL.. I had 12 42 watt cfls over kiki in flowering, most people don't go over the top that much.. Kiki's 3 clones though were vegged under 6 42 watt cfls, and then were flowering under the 12 42 watts. The buds weren't as big as Kiki's, but pretty comparable.. nute problems and the like will negatively impact your yield.. no doubt..