O! You are using CFL's! Well in that case 8-12 inches from the top and reduce direct contact from the fan. Id go with 12 until you see new leaves that aren't curling. Then slowly as you raise your humidity and lower your temp abit I keep mine at 76 you plants will be hummin along nicely and you can drop them down to 8 inches. To be truthfully honest CFLS are only good for veg. They dont flower very well on their own. So i'd suggest getting some flower boost and vegging them up for as long as you can. If you keep them on a 16-8 cycle they wont go into flower. When you do eventually want to kick them into flower go with a 12-12 and dont flower them for too long or you will wakeup to dying buds. Check out my CFL grow log Cannabis.com - Medical Marijuana, Medical Cannabis, California Club, News, Videos, Dispensary, Co-op, Co-ops, Menus, Reviews, Los Angeles :: Member :: Concaucsions if you have any questions and dont find the answers there just send me a msg mate