I’m working on a project where I want to automatically change the intensity of a heater, based on the brightness of the sun. I modeled the sun’s brightness with a drunk slider (0-100).

My project is still in a very theoretic fase, so it’s alright for me to just know which objects I should put in to make it work theoretically.
What object can I use to model the heater, for example?

(I’m new to Max6)
Thanks!