I am new to chameleon husbandry but just found out my screen cage setup was too cool. The room was cool and now there is a shower curtain wrapping the cage and a box on top to capture the heads a recirculating fan, which keeps him in the 70's, basking area in the mid 80's. When cooler he was not eating much, lethargic, I thought he was sick. I have a 150 watt basking bulb a ceramic heater, to keep his environment warm. He eats loads now, at least 8 large crickets a day.
One last thing, when my daughter takes him out to play, he turns bright colors and gets real happy. Could he be bored?
Forgot to mention the ceramic heater is on a thermostat set to 80 degrees, it is not on all the time.