EYW HALOGEN LIGHT BULB, 500 WATTS MINI CANDELABRA BASE LONG LIFE 3500 HOURS - Supra Life tungsten halogen bulbs use a quartz envelope for durability and pure tungsten for longer life. The regeneration cycle continuously restores the filament, creating a 6 times longer burning life and clear crisp white light. Bulborama tungsten lamps are engineered to minimize heat and provide maximum energy efficiency.