Don't know if this will help, but I've used the exo-terra 40gal in the past. I would use a 50 or 75 watt ceramic on a thermostat on the hot side and a 25 watt nighttime bulb with a dimmer on the other. (this was usually for colubirds so I did not need to achieve the temps required for a ball python). In the winter I would wrap three sides of the tank with aluminum bubble wrap to help hold in the heat (link below). Regular bubble wrap may work too - I'm not sure as I never used it before. I also covered the top with plexi glass that had holes cut for the lamps that were used if needed.
The one ball python we had in this set up was a 3500 gram (probably female) that was able to easily pop the lid locks off the cage - this was a second hand cage and may not have been the sturdiest, but we have to get creative to keep her in the tanks - just something to consider. With her, we were not able to get her temps in to the mid 80's with the 50 and 25 watt combo, so you may have to play around with that.
My current ball python is in a similar set up - an animal plastics T11 with a 100 watt che on a thermostat and a 50 watt nighttime bulb on a dimmer. I have not had to used the bulb since April, the che keeps the cool side beween 79 and 81 while keeping the hot side 87-90 (with the hot hide being 88-90). Hope this helps.
https://www.uline.com/Product/Detail...B&gclsrc=aw.ds
No cage is too large - nature is the best template - a snoot can't be booped too much
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