Whats up...

In my experience with CFL, the more the better. Also the bigger the better lol.
The main thing to worry about with CFLs is even though they are flouros, they still can put out a ton of heat and will burn and plants that touch them. Your CFLs should be limited to your cooling. The better cooling you have the more CFLs and the bigger you can go. Ive seen great results on these forums with 125w CFLs with reflective hoods but 23w are the most commonly used in arrays.

Ive used up to 14 CFLs in a cab before. Just had to up my cooling.
Plus the more bulbs you have the more points of light to penetrate your canopy. Hope my info helps!

Also you might already know that 6400k bulbs for veg and 2700k for flower!