"Lighted up on" can have several antonyms depending on its context. If we are referring to a person's mood or demeanor, some antonyms for "lighted up on" could be "somber," "serious," or "unresponsive." If we are talking about a room or an area being illuminated, some antonyms could be "dark," "dim," or "shadowy." In the context of a person's behavior, antonyms for "lighted up on" could be "tempered," "quieted," or "muted." Whatever the context, antonyms for "lighted up on" typically convey the opposite meaning of excitement, energy, or brightness.