Luxrite LR20420 (10-Pack) CF42DT/E/835 42-Watt Compact Fluorescent Triple Tube Light Bulb, Natural 3500K, 2900 Lumens, GX24Q-4 4-pin 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): 2900 Average Lifetime: 12,000 hours GX24Q-4 4-pin base