I have 1 probe thermoter on the hot side and a stick on thermoter on the cold side. I figured the air temp is roughly the same on both sides sonce my cage set up is a glass cage. Tin foil up top. 100 watt black bulb. Just put her on paper towels a few days ago after reading the bedding can potientially have mites. I do have some moss about the cage to help with the humidity. And a large water dish near the light. And a humidity\ thermoter stick on thing that came with the cage. I'll upgrade that to a better hergometer or however you spell it next time I get paid.