Sylvania 21134 (6-Pack) CF13DS/841/ECO 13-Watt Single Tube Compact Fluorescent Light Bulb, 4100K, 800 Lumens, T4 Shape, GX23 Bi-Pin Base Color/Finish: Cool White Color Temperature: 4,100K Lumens (light output): 800, 82 CRI Average Lifetime: 10,000 Hours GX23 Bi-Pin Base