Luxrite LR20345 (10-Pack) CF13DD/E/835 13-Watt Double Tube Compact Fluorescent Light Bulb, Natural White, 3500K, 900 Lumens, 4-Pin G24Q-1 Base Luxrite Compact Fluorescent Light Bulbs meet all your lighting needs while saving you on energy costs. Color/Finish: Natural White, Color Temperature: 3,500K Lumens (light output): 900 Average Lifetime: 10,000 hours 4-Pin G24Q-1 Base