External power pack not required|Metalized reflector version offers more intense focused light|Non-metalized version offers wider viewing angle|Dual or quad flashing patterns|Meets recommended SAE J1318 and J845 photometric specifications|Mounts horizontally or vertically|Lamp life rated at 100,000 hours|Resistance to shock and vibration|Integral flange option features built-in lens|Fit’N Fit ‘N Forget adapter plug provides corrosion and moisture resistance|Integral flange option features built-in lens