Xenon HID lamps do not have a filament. Instead the light is created by an electrical discharge between two electrodes in an air tight tiny quartz capsule filled with xenon gas, mercury and metal halide salts. This improves durability as road vibrations can cause damage to coil lighting technologies. These light sources also produce a blue-white light that is safer because it is closer to natural daylight. The increased light output from a 35 watt Xenon HID lamp is approximately 80% brighter than a 55 watt halogen bulb. The Xenon HID system will also draw less power from your vehicles electrical system.