200 WATT A23 FROST SHATTERPROOF LIGHT BULB LONG LIFE SHATTER RESISTANT BULB - 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.