This is my set up,where the UTH is,which is the hot spot I keep it at 88-91 on avg...I keep the lamp on the hot side and the watt bulb and tank I have it keeps my warm side around 84-86 and my cool side round 78.. I find when the tank is too hot he is uncomfortable. So it took a bit of messing around ,but I have found what works for hear and what I have to do for humidity as well.
good luck