Luxrite LR20435 (4-Pack) PL-L24W/835 24-Watt Twin Tube Compact Fluorescent Light Bulb, Natural 3500K, 1400 Lumens, 2G11 4-Pin Base Luxrite PL-L24W Twin Tube Light is ideal for commercial fixtures in the office, retail, and general purpose use in your household. Color/Finish: Natural, Color Temperature: 3,500K Average Lifetime: 12,000 hours Lumens (light output): 1400 2G11 4-pin base