Mounts only to rear of vehicle Flange mounts are permanently affixed to lamp Limited lifetime warranty Less current draw, resulting in increased battery and alternator life while allowing more power for other vehicle requirements Designed to comply with FMVSS 108 Faster illumination offers significant safety benefit for following drivers to react quicker, resulting in an average distance of 3for every 10 mph LEDs have no filament, therefore are impervious to shock and vibration