Ok so...before I used to use just a dimmer, but I went ahead about a thermostat that I've seen some people suggest. I bought some of the prob thermometers to double check the temperature.
The gauge on the thermostat says 78, the gauge on the thermometer says 90. It feels warmer then 78. And the thermostat hasn't moved up at all. I've got it set for 90, but it's just not getting up there according to his gauge.

For right now I unplugged the thermostat, worrying that it's trying to push the UTH up higher when it doesn't need to. My mate will be here all day to monitor temperatures, so she can adjust it if it gets too warm, but right now even without the thermostat it's hanging at 90. Anyone have any suggestions or problem like this before? I'm using/trying to use one of these: http://www.amazon.com/Hydrofarm-MTPR...dp/B000NZZG3S/