Frustration is starting to rear its ugly head. My 20 long temps are currently-- 91 hot side, 74 cold side, 50% Rh. To get these where they are at, I had to add a 75 watt Zoo Med infrared bulb in a 8.5" dome, hooked up to a dimmer. With the lamp placed in the middle of my lid, the substrate surface temp has read 95*. The dimmer works nicely, so adjusting isn't a problem (yet). Would it make more sense to keep the lamp over the hot side, or keep it centered? Thanks for reading.