It is a t5 10.0. Hes in a 40gal tank. I'm not sure about the basking light. I got it from a starter bundle. I'm using a ceramic heat emitter at night. The basking light is about 4" above the screen and the uvb covers half the tank. Should I lower the hammock a couple inches? He seems to like it where it is but he is a baby so he might not know what's best for himself.