Sec. 489(56). Lights on parked vehicles.
Whenever a vehicle is parked or stopped upon a highway
whether attended or unattended during the times mentioned in
subsection forty-nine there shall be displayed upon such vehicle
one or more lamps projecting a white light visible under normal
atmospheric conditions from a distance of five hundred feet to
the front of such vehicle and projecting a red or yellow light visible
under like conditions from a distance of five hundred feet to
the rear except that no lights need be displayed upon any such
vehicle when parked in accordance with this and other subsections
upon any highway where there is sufficient light to reveal any
persons within a distance of two hundred feet upon such highways.
