Original description by Lucas
The Lucas type P100DB are the world's finest automobile lamps. They are designed on entirely new lines and incorporate many special and exclusive features. In appearance the projectors are particularly handsome and majestic, and their fine workmanship and finish are fully worthy of Lucas lamps intended for world leading cars.
Their reflecting system is designed to give a splendid high-power light, carrying an extraordinary distance ahead, while flooding the width of the road with a more diffused light.
A bulb- holding tripod forms part of the forward extension of the reflector, which enables the main bulb to face towards the reflector. The reflector is therefore devoid of any central aperture, thus giving maximum amount of reflecting efficiency.
Front 13 inch Aperture, 10 3/8 inch Weight, 10 1/2 lb