When a vehicle is parked or stopped upon a highway or shoulder adjacent thereto during the times when lighted lamps on vehicles are required, it shall be equipped with one or more lamps which shall exhibit a white or amber light on the roadway side visible from a distance of 500 feet to the front of the vehicle and a red light visible from a distance of 500 feet to the rear, except that local authorities may provide by ordinance that no lights need be displayed upon a vehicle when stopped or parked in accordance with local parking regulations upon a highway where there is sufficient light to clearly reveal any person or object within a distance of 500 feet upon the highway. Any lighted headlamps upon a parked vehicle shall be depressed or dimmed.