So I tried that..... mat then probe then enclosure.... but then I wasn't getting enough heat when I used my ir temp gun to get a reading. The mat has two barriers (glass and then the tray) to try and push heat through. I provided a link of the type of enclosure I have. https://www.petsmart.com/reptile/hab...ium-59177.html
I would provide pics of my setup but it says it's too big to process.