Uth doesn't heat the air just the surface above it, that is why you want a probe thermometer under the substrate right on top the glass over the uth and it should be no hotter than 94. You can either buy a thermostat from amazon like the inkbird itc-308 for around $30 or if you want a nice proportional one a Herpstat 1 for $140 or a lamp dimmer will work but you will have to watch temp note closely bc it won't automatically adjust like a thermostat will so you would have to do it manually with a dimmer. I would use your night bulb 24/7 until you get a dimmer or thermostat, no need for the day bulb. Since you will have the uth unplugged until you get something to regulate it you will need to put your thermometer probe right on the ground on top of substrate where the center of the bulb beam hits and make sure it is no hotter than 92, you may have to raise or lower the light dome until you get it where it needs to be, around 88-90 is best. Once you get the thermostat or dimmer you will then move the probe under the substrate like I said before. I would recommend another thermometer for your cool side bc you need the temp there to stay between 78-82 but a little lower is ok but no lower than 75. You want not need the light once you have your uth regulated. The only reason you will need the light once you get your uth regulated is if your cool side is lower than 75 then you can put light on cool side and dim it to 80.
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