Sounds fine to me. i myself am in the same predicament i have a 42 watt standard socket cfl, a 65 watt 6500k cfl and two 17 watt 2700k flouros. as far as heat things can get a little hot in the 1-3 inch range i would back them off to about 5-7 inches add a fan and watch it grow. a 21 watt cfl...