PC-rated lighting mix the 2 purposes of clearance and facet marker lighting into one. Whilst correctly fastened, a PC-rated lamp produces a 90 level attitude of sunshine left and proper of middle (in comparison to 45 level of conventional clearance/facet marker lighting). Calls for mounting grommet and a pair of-twine plug to finish install. Options 15,000 hour-rated lengthy-lifestyles bulb. Use 146-18 grommet and 142-forty nine plug.