Hey there again Mister 420! Good to see you are flowering!
I would say yes, for the current size of your plant 4 is good for now. You could always have more, but she will flower just fine. Be sure to watch the temps and be careful! A few times with my plant + growing with CFL's she grew very quickly and sometimes her leaves would reach out and touch the lights. Of course the lights were much too hot for her (Icarus anyone?) and the tips of her leaves would burn and die.
Later on as she gets bigger you may want to add more light. What I did was kept my 6500K lights and added 2700K's. She seemed to like that very much and is doing great now.
Look for those hairs starting to pop out in a week or so! Good luck!