Lets compromise and say, someone's wrong. There you both go, problem solved. I would think that the 60w would certainly reach 80 degrees, I could also say that the smaller ones might not reach quite that high. Thermometers can build up heat when exposed to direct heat, (like any object), and may thus display slightly augmented temps. Just a thought. Not meant for one of you over the other, just something I've noticed.

Evan