I have had it set up from about 24 hours it just can't get to 90 on the hot side I do have a small heating pad under where his belly would be but it's till topping out at about 83 degrees and I know my guy likes 90 so I have a 60 watt ceramic and a 100 inferred I'm going to go with 2 100 ceramic light cuz im frankly tires of see the red like light up my whole freaking house. Whish I had time to order them in I know that pet store will rape me over the coals on this