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Double set back 24volt thermostat digital
Why your preference for Lux, guys? Here's the problem I have with Lux--lots of product problems, including very loose temperature control. I would recommend only thermostats made by the "majors," Honeywell or W-R.
Here's where the bad temp control comes from on Lux. In order to be inexpensive and "slim," instead of a mechanical relay, they use a triac. A triac is a resistor, and resistors always create heat when there's current going through them. So whenever there's a call for heating or cooling, the thermostat is making its own heat inside itself. As a result, it doesn't know what the room temp really is.
Honeywell for sure, and maybe still W-R, uses real relays. You can hear the click-click of its action. That means there's no artificial heat being created by an electronic relay, and there's tight temperature control (plus or minus one degree from setpoint).