I have one point light and one model in my scene, rendered in Cycles. What I'd like to do is create a proximity around the model, so that when the light approaches it, or any point light approaches it, it gradually becomes brighter. The closer it is to the object, the brighter the light. If the light leaves the proximity, it fades, until the light is shut off completely.
I know I could animate this by hand, but I'd like to have it happen automatically, like some videos I've seen where you have a null object, you move it near the model and it alters the models shape, or makes something grow around it. Just want to have this functionality with lights instead.
The only other alternative I thought of, is if there is some kind of setting somewhere, that I can define the reach of the light. So for example, I wouldn't have to move the light so far across the screen before it fades out.
Is there someway to achieve what I'm looking for?