When people refer to the ambient temp of the enclosure, (i.e., don't let it fall below 75) where specifically should this temperature be taken? (back center of the tank?, just above the substrate on the cool end?, etc.) Right now I have the basking temp regulated using a rheostat until my thermostat arrives. I have about 3/4 of the top of my 20G aquarium covered with plexiglass, which is keeping the humidity about perfect. (55-60%) The Fluker temp/hygro is about 1-2" above the substrate in the center of the tank. My concern is that the temp on the fluker is indicating about 70 degrees on average. If I turn on my 75W black light at the cool end, I can raise it up a few degrees. Being that my basking temp and humidity are fairly decent, should I concern myself with the "ambient" temperature? Should I leave the black light on 24x7? I live in NH so the temps here are fairly cool. The BP enclosure is in my daughter's room and the ambient temp in the room is around 68-70 on average. The only issue I see with keeping the black light on 24x7 is that it lowers the humidity around 15% or so. I don't really want to add another UTH unless absolutely necessary. Thoughts? I've included a picture of the enclosure.



Thanks,
- Bill