What do you use on a timer to signify a change from day to night? Should I get a secondary light that doesn’t put out heat to turn on and off each day? Do you leave your CHE on day and night, and is it black? Should I put the CHE and UTH on the same thermostat? If so, where should I put the probe? Or is it better to have two thermostats, one for the CHE and one for the UTH?