Well what kind of other lights do you have?
Also, what color temp are the cfls?
I would recommend a 400w HPS minimum with a dimmable ballast for small clone/seedling.
If you can afford it, there is an excellent sale on 600w HPS w dimmable ballast on Amazon for 119.00 comes with cheap but effective bat wing reflector, a super 600 hps bulb and a MH 600 bulb AND hanging hooks. Brand is called ipower. Check it out if you have a few dollars for a steal.
Good luck and questions are always welcome