Hi!

I am getting my first ball python on April 23. I have purchased a 36x18x12 Exo-terra, and I was wondering how to heat it?? I believe its about 30 gallons. My room at night is about 65 degrees, and 70 during the day (I have a bearded dragon on the other side of the room with basking lights). So I was wondering what heat mat to get? I am able to get an additional source of heat, I have a fixture, and a 40 watt ceramic heat emitter, as well as a 50, and 75 watt red heat light bulbs, (and I could buy something other than this too) from previous animals. I would also be open to having some sort of day time bulb, for viewing, and a bit of heat, but that would be instead of the other lights, so only if I don't need them too much, as I don't want to have too many things plugged in.
To recap: I was just looking for suggestions and guidance on purchasing a heat mat (wattage, brand, etc.) as well as what additional heat I need.

Thank you!