I just got a thermostat and an UTH for my sons corn snake that he got about a month ago. Prior to that we just had a red night bulb on (75W) that seemed to keep the warm side around 88 and the cool side around 75. Because everyone advised the UTH instead I decided to try it and have the thermostat set to 88. The probe is on the bottom of the tank directly above the heater. The temp on the digitial thermometer (probe also on the floor of the tank to see what the thermostat is readin) says around 88 (fluctuates a bit as the thermostat turns on and off) but the cool side is now down around 65 and that is during the day. I worry about what it will get to in the evening or winter. Any advice?