[68Timber]

It's not an LMC headlight, Sylvania makes them. Regular glass but puts out better light than regular lights. The relay harness makes the headlights get their power on a shorter path, from the battery to the headlights instead of the factory path into the cab and through the headlight switch then back out to the headlights. This prevents voltage drop and gives brighter lights. The upgraded bulbs with the relay harness make a really big difference.