The Systems Xenarc D3 and D4 are well-known for their excellent performance and are mercury- free HID light sources offer all advantages of the existing Xenarc Lamps from OSRAM. With the new Technology of the XENARC family, OSRAM offers a new higher intensity to vehicles. The XENARC gas discharge lamp does not have a filament. Instead an arc is created between two electrodes in a quartz bulb, which is filled with xenon gas and metallic salts. The lamp ignites when high voltage is applied. Igniting, heating and stabilizing the arc of a Xenarc lamp requires an electronic control gear. The System consists of an electronic igniter and an electronic ballast unit. Advantages. Higher luminous efficacy, reduced heat output and much longer lamp life. Twice as much light as a modern halogen lamp, and less energy required. The light efficiency is 300 % higher than with conventional halogen lights and it provides a remarkable improvement in driving safety. Xenarc lamps operate in the range of 4100 to 4500 Kelvin, the colour temperature of the light is much closer to that of natural daylight. Offers better lightning of the street, driving tours by night can be easily managed without tiring the eyes. Product name D4S Base PK32d-5 Reference 66440 Light source wattage 35 W Lamp voltage 42 V Luminous flux 3200lm Color temperature : 4150 Kelvin Lifertime 3000h Packaging content: 1 x OSRAM XENARC D4S headlamp bulb 66440