There are actually many more factors as you might have imaginied. I just gave a basic break down of the issue. I keep some snakes like rubber boas that I like to keep in tubs with an ambient of 72-75. Then the snakes that need it to be warmer I use under tank heat for the hot spot and supplement with lighting to raise the ambient.

It is an elaborate system that I have constructed and it normally works perfect. I screwed it up by adding 6 more enclosures, a rack, a computer to run Degei and I wired some new track lighting in the room. Just too much extra heat.

I am sure I will figure it out. I am expirimenting with the lighting today and running a fan during the day.