Heat Mat Thermostat Question
I did some experimenting and created a heat mat from rope lights I found at HD.
Initially I used just one 18' rope and it seemed to do OK but there were some cold spots as some of the heat escaped out the bottom of the shelf I had them sitting on.
So I cut a scrap of plywood to fit the shelf and then mounted the rope lights to the wood.
It works probably too well. surface temp on the cells is 80-85 but with a kitchen probe into the soil some are in the 90s. So Currently I have it set to 2 hrs on and 2 hours off via a timer. I was considering just putting a heat mat thermostat on the setup but I was wondering how that would work. does the device turn the heater OFF if the temp gets too high and back on if it gets too low? Or does it adjust the output like a rheostat (i.e. adjusting how warm the mat actually is).
I assume the on/off function would work just fine with the lights but not sure about the rheostat. I plan on sticking the thermostat prob into one of the warmer cells and using that as the basis for the thermostat and then setting it a few degrees cooler
here is my setup