The under tank heater is set off to one side, and it is what's actually creating the 90 degree hotspot. The air on the hot side however doesn't need to be that warm. The heat lamp is centered so it can evenly heat the air in the cage to 80 degrees. This uses less electricity and helps keep humidity higher.Originally Posted by LooptyLoo
If you are using a heat lamp as the only heat source on a cage it should be offset to one side or the other.
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