MOGUL BASE 3 WAY LIGHT BULB - 100/200/300 WATTS - 130 VOLTS - 5,000 HOURS LONG LIFE - SOFT WHITE FROSTED GLASS - Industrial Grade 5,000 hour incandescents are engineered to last up to 8 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, industrial grade three-way bulbs are the strongest made.