I have taken care of lizards since I was a kid, such as beadred dragons, uromastyx, and monitors.

I recently adopted a baby Ball python, and I wondering is its really necessary to get an under tank heater. Right now Im using two ceramic heat and the ambient
temperature is 80 degrees and basking spot at 95 degrees.

I added an Under tank heater and it didn't seem to make a difference.
Can I get by with using just ceramic heaters?

What the point of under tank heater?
Doesnt seem to heat up the bottom of the tank.