TCP 3302635K Fluorescent SpringLamp CFL - 100 Watt Equivalent (only 26w used) Bright White (3500K) Spiral Light Bulb - PL 4-pin (G24Q-3) base Please NOTE: This lamps has a 4-Pin G24Q-3 base Non Dimmable Lifetime: 9.1 years Watts Used/Lumens: 26 Watt/1750 Lumens Estimated Annual Energy Cost to Operate (based on 3 hrs/day): $3.14