overlight

/ˈoʊvərˌlaɪt/
verb
  1. To light or illuminate too much; to make too bright.
    • The photographer warned that the flash would overlight the subject's face.
    • Be careful not to overlight the room with too many lamps.
    • If you overlight the stage, the actors' expressions will be washed out.
noun
  1. An excessive amount of light; too much illumination.
    • The artist complained about the overlight in the gallery, which faded the paintings.
    • The overlight from the street lamps made it hard to see the stars.
    • In the greenhouse, overlight can damage delicate plants.