3 feet long isnt big.. I have 4' long tanks for quarantine and i have Cardboard on 3 sides for insulation and to help the snakes feel secluded .. Wothout knowing anything about your set-up nobody can help you. What lid do you have? If its a screen cover 3/4 at least with Tin Foil/Towel/Plexyglass.. Also your using the heat source overkill on the Hot Side.. Use the UTH for the Hot Side Belly Basking at 88-91 .. Then put a CHE (I dont like lamps and most snakes don't like light) on the cool side for a Ambient of 78-81.
Your Lamp is the cool side appropriate ambient and the Hot side is the pad.

Here something to look at.
https://ball-pythons.net/forums/show...-With-Pictures!


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