Actually, according to most care sheets I've read, those temps are a little low. His humid hide needs to stay hotter than the rest of the cage, and the rest of the cage needs to stay at 82ish on the cool end to 90ish on the hot end. Mine tends to stay around 85 to 92, 97 in his humid hide (most easily made by cutting a hole in a tupperware container and putting damp peat inside and placing it on the hot end). This is a really good care sheet that I use at the bottom of this page, it will help you out. What I do to keep my temps this way is I use a 75 watt heat bulb and undertank heater (attached to the side of the terrarium because I do not have an open-bottom set up) on the hot end. At night, I change out the bulb and replace it with a 50 watt red bulb (they can't see red). This keeps temps between 78 and 83 at night. If you want to see a picture of my set up, scroll down a few posts and read AFT Pictures.
AFT care