The advice your getting while not wrong is well, odd.
FIrst, what kind of cage? does it have a screen top, or large vents, is so, cover them.
Get rid of the heat emitter. Use a regular lite fixture in the cage. Place the fixture so its about six inches from the nearest surface. Usually the top of a hide, Retes boards, etc.
Measure your hot spot there. I would hope the cage is in a room, if so, room temps are perfect. Part of the cage at room temps, on the otherside, under the lamp, 130F or a little hotter.
I think you mentioned dirt as a substrate. All you need is for part of the cage to be NOT DRY, humid is all. Like misting half the cage is all thats needed with a closed cage.
Then feed the beans out of it. Including pinkies and insects.
If its holding its head up, that is not a good sign, high heat may take care of that quickly, If not, to the vet it goes.
A temp gun is all you need. All that other stuff is, well just other stuff.
In case you don't already know, I have raised up hundreds of monitors successfully.
The actual point of good husbandry is to keep it simple and make it easy for both you and the monitor. You provide some things, the monitor will provide the rest.
The key is allowing air movement. Because of high basking temps, that can cause lots of air movement and that causes dehydration. You only need the minimum wattage to create a basking area with the temps mentioned above. any more is a waste and causes dehydration.
So, KISS, keep it simple stupid. Hey, I did not make that up. but it works here.
After you have it simple and working, you them make lots of fun out of it. Cheers