A more complete set up description and pic will help.
The heat light in the enclosure doesn't sound right and I see no night heat source listed. So, I am wondering if she is trying to thermo-regular using the residual heat after the lamp is turned off. Unless she has a CHE, RHP or infra-red for night heating.
Balls do tend to be nocturnal and if they are going to be active night time is the most likely time.

She should also have a hide on both the hot and cool side. That will let her control her body temps a bit while still feeling secure.