GE Lighting 24699 30-Watt/70-Watt/100-Watt A21 Edison Halogen 3-Way Halogen lamp will provide up to 2.2 years of use on average, with an approximate energy cost per year of about 3.61/8.43/12.05 dollars Application: 3-Way table lamps 3-Way Lamp light illuminates environment around you with light output of 320/1050/1370 lumens Light is well suited for most General Purpose lighting applications, color temperature rating: 2900 K Replace your bulbs less often using the 30/70/100-watt Halogen lamp, with about 2500-hours of running life