337.03  HEADLIGHTS ON MOTOR VEHICLES AND MOTORCYCLES.
   (a)   Every motor vehicle, other than a motorcycle, shall be equipped with at least two headlights with at least one near each side of the front of the motor vehicle.
   (b)   Every motorcycle shall be equipped with at least one and not more than two headlights.
(ORC 4513.04)
Penalty - see Sections 307.01 and 307.02