More Cfls, Bigger Box, Say Fuck the foil most of the time it leaves burn spots unless completly wrinkle free your better off to paint it white. I think i see spots here and there already. And if your useing a small box you have enough light for now watch your temps when things get crowded. Once you start flowering your gonna need more light 2700k temp bulbs and a good amount of them if you want decent yields.
If your gonna keep useing CFLS one thing i have found to be best is Keep them Close to the plants and keep a breeze going across them and they stay fairly cool.
didn't see any posts so i figured i would chim in with my 2 cents.....