337.12  COWL, FENDER AND BACK-UP LIGHTS.
   (a)   Any motor vehicle may be equipped with side cowl or fender lights which shall emit a white or amber light without glare.
   (b)   Any motor vehicle may be equipped with lights on each side thereof which shall emit a white or amber light without glare.
   (c)   Any motor vehicle may be equipped with back-up lights, either separately or in combination with another light.  No back-up lights shall be continuously lighted when the motor vehicle is in forward motion.
(ORC 4513.13)
Penalty - see Sections 307.01 and 307.02