A lighted roll up door assembly may include a roll up door including interconnected slats movable along tracks, and a lighting element configured to be attached to an exterior side of the roll up door. The lighting element can be mounted so as to direct a substantial portion of the light output toward the roll up door and below a horizontal direction so as to light a portion of the door and an adjacent area below the door at least partially by reflection when the door is in a closed position and so as to light an area on an interior side of the roll up door when the door is in a opened position. The lighting element may be mounted to a fixed or movable member attached to a slat of the roll up door.