Pack Of 25 40S11/N/C 40 Watt S11 E17 Intermediate Base Hi-Intensity Light Bulbs, Clear 40-Watt S11 Hi-Intensity light bulb, Intermediate Base E17 can be used in 120 and 130 volt fixtures. Equipped with a heavy-duty filament allowing for a Longer Life & Durability. Average life: 1,500 hours ideal for use in, marquees, signs, nightlight, microwaves, ovens, and other small household appliances Can also be used for: Lava Lamps, Cabinets, High intensity Desk lamps Incandescent Light Bulbs represent state of the art lamps for residential and commercial use