Sounds like you are going to be able to figure things out.I have 3 thermometers, one meat style, one glass, and one electric hygrometer combo. I calibrated the meat style, but I’ve never calibrated one before and don’t know if I did it right. I have no confidence in the "boiling point" side of calibration, as water will continue to boil at temperatures over the boiling point. I am going more by the glass one, because that technology has been around a lot longer, and all of them that I looked at in the store were all reading the same, so I figured they had to be pretty accurate. It’s a large easy read so I am able to read it through the window of the incubator without opening it. The meat style is reading about 6 degrees lower from the glass one after calibration, and the electric one is all over the place, although I think it only takes a reading once every minute or so. I got it because it tracks highs and lows, but it takes forever to drop an old temp reading.
For my heat source I am using a ceramic heat emitter because it doesn't put out any light. I was going to change to a basking light I have, but it was crazy bright.

I am not sure about your heat source, I know zero about these type of lamps.
Is there a reason why you don't want it to use a regular old light bulb?