When used in a 3-way socket, this bright Soft White Light compact fluorescent will deliver three distinct levels of light. At its lowest setting the bulb will consume just 11 watts of electricity, producing an amount of light that is roughly equivalent to a 30 watt incandescent light bulb (600 lumens). At the middle setting it will draw 20 watts of power, the light produced is equivalent to a 70 watt incandescent light bulb (1,200 lumens). On the highest setting 26 watts of electricity will be used, offering a light level similar to a 100 watt incandescent light bulb (1,700 lumens). Power Requirements: 120 volts AC, 60 Hz Wattage: 11 watts (low), 20 watts (med), 26 watts (high) Dimensions: 2.75" wide x 5.8" long Light Output: 600 (low), 1,200 (med) 1,700 lumens (high) Color Temperature: 2700 degrees Kelvin Rated Lifetime: 10,000 Hour.