THREE WAY INCANDESCENT LIGHT BULB - 30/60/100 WATTS - 130 VOLTS - LONG LIFE 10,000 HOURS SUPRA LIFE LAMP - Supra Life 10,000 hour incandescents are engineered to last up to 10 times longer than standard light bulbs, therefore reducing operational and maintenance costs, and saving both time and money. Equipped with a rugged 5 filament support, pure tungsten coil, reflector disc, and brass base, Supra Life lamps will burn continuously for an average life of 18 months in commercial applications and up to 6 years in basic household use.