TCP Fluorescent Quad Tube, 13W (875 Lumens), Soft White (2700K), 4-Pin (G24q-1 base) Quad Tube PL Lamp Please NOTE: This lamps has a 4-Pin G24q-1 base Non Dimmable Lifetime: 9.1 years Watts Used/Lumens: 13 Watt/875 Lumens Estimated Annual Energy Cost to Operate (based on 3 hrs/day): $1.57