hmmm all these posts with people saying all you need id an UTH... We have a large UTH, large basking light (hot side) and red light (cool side set to turn on if temp falls below 80) This keeps the temps where they need to be, although the lamps do dry the air our house has a daytime temp of 73 and at night I let it drop to 66 but really I can't see going with just an UTH...