Vehicular lamp for nebulous weather

An arc discharge vehicle lamp ( 10 ) for nebulous weather comprising a body ( 12 ) defining a chamber ( 14 ) having a volume of between 0.025 to 0.035 cc and including spaced apart electrodes ( 16, 18 ) having an arc gap ( 20 ) of between 2 and 6 mm; and an arc generating and sustaining medium ( 21 ) in the chamber for developing light having a color temperature between 1800K to 2800K during operation of the lamp. A preferred arc gap is 4.2 mm. The electrodes ( 16 and 18 ) are preferably fashioned with three parts; a niobium sealing region, an intermediate region of molybdenum and a tungsten region, which protrudes into the discharge chamber.