Unfortunately don't think I'll be able to do what I want with it which is dim lights if temp goes too high.
If the dimming proves unobtainable; as compromise,,,
Could maybe replace the outlet controllers for on off,
Without a firm grasp on the entire big picture, I will just make some stuff up.
Is this a situation where you have multiple Banks of light, that can be shut on and off?
For example, if there was four light panels, that could be shut on and off individually.
Let's say that all four panels, running at 25% dimmed, would provide an ample temperature.
Would the same temperature be achievable with two panels running 100% of the time, and the other two panels switching on and off , as the heat controller dictates?
Like I said, it is a compromise. Whilst the arrangement would address target temperatures, it would naturally cause DLI inconsistencies within specific areas of the canopy, as some plants would be lit full time, whereas others would be basking under an intermittent light.
Not certain if I have presented that coherently enough to communicate my idea. It was on my mind, as I was considering a similar solution for my garden.
I was thinking about going with multiple, smaller hid sources.
Any given day this winter it will be range from -35 up to 60 Fahrenheit
When it is stinking cold I need 1800 watts ( 350W x 5'ish fixtures)
On a warm day, I might only need three fixtures.
Not sure how many zones you can muster, but the answer may be hiding there.