Never used the cfl's before but do most of my sprouting,cloning,vegging under 4ft floro shoplites, and using cool white bulbs. Mainly its to save on heat production and elec costs. Heat in the summer can be a concern, and floros will clone and veg very nicely if you keep the tops very close to the bulb. With my 4ft shoplites, i can actually let the bulb touch the grow top for a day without any permanent damage.

Nothing wrong with using the hps either. It burns hotter, keep the bulb a foot away from the tops, but it puts out much more lumens than the floros.

It kinda works out either way. Hps offers more lumens but, burns hotter and has to be farther away from the tops.
Floros burn cooler and can be right on the tops, but produce less usable lite. The big difference is when they are flowering, then you pretty well have to use the hps and MORE POWER..... HARAGG. Good luck.:thumbsup: