1 24 isn't good enough. Try getting 2-4 more of them. Are they 6500k bulbs? Those are for veg and seedlings, then you go to 2700k when you flower. I have 4 bulbs on mines and it can use more.
You want about 3500-5000 lumens per plant I believe. 1 24w cfl will only give you about 1500-2000 at most I would think. Your def gonna want more light then that.