Hello all and thank you for your input in advance. I have confusion as to where to take my hot temp readings from. I use an UTH and a daytime incandes bulb. Should the hot side read come from under the substrate in the hide, on top of the substrate inside hide, an inch over the substrate? It seems that everyone reccomends something different. As of now im reading 88 outside of hide on substrate, 92 on substrate inside hide and 100 under the substrate directly on top of the UTH. Just want to make sure i dont burn him if he digs through the 2-3" aspen.