ANSI CODE TYPE FER HALOGEN BULB - 1000 WATTS - 120 VOLTS - T6 TYPE HIGH INTENSITY HALOGEN - 5.63 INCH LENGTH - LONG LIFE 1000 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.