Sylvania 20671 (4-Pack) CF13DD/E/835/ECO 13-Watt Double Tube Compact Fluorescent Light Bulb, 3500K, 900 Lumens, 82 CRI, 4-Pin G24q-1 Base Color/Finish: Natural White Color Temperature: 3,500K Lumens (light output): 900, 82 CRI Average Lifetime: 12,000 Hours G24q-1 4-Pin Base