TCP 32013ISQ35K Fluorescent Instant Start Quad Tube - 13 Watt (810 Lumens) Bright White (3500K) 2-Pin (GX23-2 base) PL Lamp Please NOTE: This lamps has a 2-Pin GX23 base Non Dimmable Lifetime: 9.1 years Watts Used/Lumens: 13 Watt/810 Lumens Estimated Annual Energy Cost to Operate (based on 3 hrs/day): $1.57