Dimming lights is it a fire hazard?

Hello everyone, it’s been a while. Just set up another tank and the light I’m using is very strong. It’s a beta tank so ideally I’d like it dimmer. I covered it with wax paper, and am now curious as if that’s a possible fire hazard. The top of the light gets very hot, by the way. I have a book light I can use it’s just inconvenient.