I agree 10 plants it a shit ton for CFL growing, not saying you can't do it but you'd be better off with HPS. If you still want to go the CFL route you want about 100w per plant, but a more correct way of gauging how much light you need is the size of your grow space. You want about 2500 lumens per sqft for early veg, 5000 lumens per sqft for veg, and for flower (is still widely debated) you want 7000-10000 lumens per sqft. You still need to be aware of heat though. Good luck and toke on dude.