so from what i understand i would want to get a CHE for the hot side and run it 24/7 (would i need a thermostat/rheostat to run with it?). and some flexwatt or another UTH for the cool side. would it be a problem if it's heating the hot side from the top and the cool side from the bottom? does the tank need a light as well or will the natural day/night cycle be sufficient for a snake? as you can see i'm really trying to get my ducks in a row before i actually own a snake. And i would need to cover a good portion of the screen with something to keep the humidity in, right? and it makes sense to me to have the hot side uncovered for the heat from the CHE to transmit heat properly.