I dont think led lights provide much warmth. Another thing that has become widely used and cheap is video surveillance. You know, for the "rats" that come out at night.
It seems as though some people have had luck with lights in engine bays to keep pack rats out. I dont see how they would keep racoons or possums away. For years in Michigan there was an open season on coons because they are so destructive. I have seen them and porcupines chew through the floor of Rv's.
I'm still shopping as there seem to be a very wide range of led lights available. I think I need about 300 feet.