Burns 26 times longer than the average general service bulb. Twenty Six Times the life of the average conventional bulbs and up 5 ' 8 times extended long-life bulbs for substantial savings in labor/replacement lamp costs. Highest grade, non-sag tungsten filament mounted on two lead wires and 5 support wires to help provide long life and excellent resistance to vibration and shock. Reflector disc protects basing cement from heat and more light on task area. Special rare gas Krypton mixture reduces heat and prolongs filament life. Brass base eliminates corrosion and prevents base from sticking in socket.