On the bright light…..once the fox realizes that it;s not really a threat, it will No longer be deterred by the light. Move the light around, if possible so that the fox doesn’t figure out it’s always in the same spot all the time.
i don’t know why, but dogs do attract foxes. I had to put a fox down a couple of years ago because he was “baiting” my Border Collies by coming to their fenced in area every afternoon and yelping at them. I ended that game. They were coming too close for comfort.