I am using the same thermometer I use for all my other critters, and its about 90 in the hot end (I have an under tank head pad, and a red light when needed) Once in a while it gets up around 93, and i turn the light off. (and at night) The other end sits around 80.
By "hot end" i guess i mean directly under the light, when its on.
The tank is also in the bedroom, which rarely has a light on. The wife works early, and I work late, so she is in bed early (lights out) and I am up later, so lights dont come on till plenty after the sun is up.
I also have a towel over half of the tank, and the other half is against a shelf that holds the chameleon's cage, so there is really very little light getting in.
I can try and post a pic of my set up soonish.