In order to fill that space with buds under CFL's from a single plant do some reading on LST (Low Stress Training) and SCROG (Screen of Green) style grows.

I am logging a single plant SCROG here, http://boards.cannabis.com/grow-log/...hot-2-a-3.html I am using HPS but if you spread CFL's over the top evenly it would work.

Pic from last night, http://boards.cannabis.com/grow-log/...hot-2-a-3.html

The trouble with floro is the effective light only travels about 6" from the source. So you have to have a LOT of them really close to the plant to get any kind of yield.

Good luck! Welcome to the fun!:rastasmoke: