Wyoming Statutes Title 31. Motor Vehicles § 31-5-920. Parked vehicles

(a) Every vehicle shall be equipped with one (1) or more parking lamps which shall comply with the regulations of the superintendent.

(b) Whenever a vehicle is lawfully parked upon a street or highway during the hours between one-half (1/2) hour after sunset and one-half (1/2) hour before sunrise and if there is sufficient light to reveal persons and vehicles within a distance of five hundred (500) feet upon the street or highway, no lights need be displayed upon the parked vehicle.

(c) Whenever a vehicle is parked or stopped upon a roadway or adjacent shoulder, whether attended or unattended, during the hours between one-half (1/2) hour after sunset and one-half (1/2) hour before sunrise and there is not sufficient light to reveal any person or object within a distance of five hundred (500) feet upon the highway, the vehicle so parked or stopped shall display parking lamps complying with the requirements of the superintendent.

(d) Any lighted head lamps upon a parked vehicle shall be depressed or dimmed.