It's a 3' tank and an 11x17 pad so it almost covers half ((I have an 11x23 coming monday))
The side without a working UTH is sadly only 74-75.
I rescanned the side with a UTH and it is 89.5 below the substrate and the very low 80's atop it. Except in her hide where she is where it's 85.
When I get my dimmer switch tomorrow though the UTH's will cover the whole of the tank. as there will be two 11x17's. one UTH for basking, one UTH for ambient.