I agree with "cangroit". You really need to research more before you try to grow anything with 39watts. I am the only person that I know of "personally" that has had success with CFL grows the way i have. Sure, anyone can stick a plant under a CFL and let it grow but what is the point of going really small. You will spend more on the grow than what will benifit you in the end if you go small with CFL's. I pulled over 11oz's with only 650watts of CFL's off 2 plants and that was in a total grow time of 101-days. The only reason I still do CFL growing is because of heat issues and I have had great success. I only started with CFL's to prove to a buddy that I could grow tighter and frostier medicine than he was with 1000watt HPS. Now im hooked. Many people just dont understand that you always need more CFL's than you think. If you are going to grow with CFL's then you need to do some more research and make sure you have a plan/routine that you can stick with through-out the whole grow. These particular plants love routine and when you take them out of routine, weird things can happen for no appearent reason. Check out my 1st log and you'll see what CFL's can do.