TCP 3201341K Fluorescent Twin Tube PL Lamp - 13 Watt (800 Lumens) Cool White (4100K) 2-Pin (GX23 base) Please NOTE: This lamps has a 2-Pin GX23 base Non Dimmable Lifetime: 9.1 years Watts Used/Lumens: 13 Watt/800 Lumens Estimated Annual Energy Cost to Operate (based on 3 hrs/day): $1.57