Sylvania 20877 (4-Pack) CF18DT/E/IN/835/ECO 18-Watt Triple Tube Compact Fluorescent Light Bulb, 3500K, 1164 Lumens, 82 CRI, T4 Shape, 4-Pin GX24q-2 Base Color/Finish: Natural White Color Temperature: 3,500K Lumens (light output): 1164, 82 CRI Average Lifetime: 12,000 Hours 4-Pin GX24q-2 Base