30 WATT PAR36 SPOTLIGHT BULB 12.8 VOLTS REPLACES 4405 BULBS WITH LONG LIFE 250 HOUR INDUSTRIAL GRADE QUALITY - Industrial Grade PAR36 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 rugged filament supports, pure tungsten coils, and non corrosive screw terminals, Industrial Grade lamps will burn continuously for an average life of 12 months in commercial applications and up to 5 years in basic household use.