Reptisun 5.0 is ok.. Reptisun 10.0 is better thats what I use in all mine.. I have also used the repti glo 8.0 but in reality if you look at the uv guide that has all the test results of the lights its not better than the reptisun. so i would stick with the reptisun florescents.. Not the twist bulb.
Heres a good site too. I order my lights from here. they have good prices on supplies. been using them a couple years now. http://www.petmountain.com