CFL's are awesome to use from seedling all the way into the first couple of weeks of budding.
I prefer to use T5's.
They don't use as much electricity and their brighter.
Once you get into full fledged flowering, you'll need something that put's out a bit more juice and spectrum to produce nice sized buds.
At least a 400 watt HPS with a decent bulb does the job.

__________________
A FEW TOKES A DAY KEEPS THE DOCTOR AWAY