The Bacon Brothers — aka film star Kevin Bacon and his musician brother Michael — borrowed a show biz term for the central metaphor behind their new song, “Losing the Night.” “We have a term in the movie business, ‘Losing the light,’ which is when you’re about to lose the shot because the sun is about to go down,” Kevin explains in a statement. “We thought it’d be cool to write a song called ‘Losing the Night,’ which is about this couple in a motel room having problems and they know that if they don’t figure their problems out by the time the sun comes up, that’s it for their relationship.” Th…