GE 47448 12/23/29-Watt CFL (50/100/150-Watt equivalent) Energy Smart Spiral 3-Way Light Bulb 50/100/150 watt replacement uses only _12/23/29 watts 600/1600/2150 lumens providing strong, vibrant light Lasts 9.1 years based on 3 hours per day usage Suitable for general purpose use T3 spiral shape for use in table lamps and enclosed fixtures A smart way to save energy Application: 3-Way table lamps Base: medium screw (E26); Bulb type: T3; Watts: 12/23/2029 Initial Lumens: 600/1600/2150 Guaranteed to last 6 years based on 4 hours use per day at 120V.