Sylvania 20318 (6-Pack) CF13DS/E/841/ECO 13-Watt Single Tube Compact Fluorescent Light Bulb, 4100K, 800 Lumens, 82 CRI, T4 Shape, 4-Pin 2GX7 Base Color/Finish: Cool White Color Temperature: 4,100K Lumens (light output): 800, 82 CRI Average Lifetime: 12,000 Hours 4-Pin 2GX7 Base