CLF's are cool compared to other bulbs, i mean you should have a fan on the plants anyway so this shoudl be good enough, just make sure you have enough of them and place them aroudn the plant, i am using them now and they are doign well but remember you could do better (more yiled) with a better light, don't let anyone tell you that you can't grow with a CFL, you can look at my plants, and i'm a first timer!!!!!!!

GG23