How many plants are you growing? Cause for a few plants CFL's will do ok, but anymore then 5 and your going to need better lighting. I grow in an all flourscent room, both veg and flowering, and the light is FAR better then small CFL's. I run 5 double light workshop lights with 10 32W 5000K and 3300K flouro tubes. I will admit a 400W HPS would be better for flowering but I was having an issue with temps getting too hot, and it is proven that while flouro's will give you less yield, they will stimulate more trich development by up to 25%. It has to do with spectrum, the closer you match to the sun the better it is. HPS lack the blue side of the spectrum which is why alot of growers will mix both an HPS and an MH together, producing large yields and potent buds.