Luxrite LR20836 (2-Pack) F24T5/835 21-Watt 3 FT T5 Fluorescent Tube Light Bulb, Natural 3500K, 1850 Lumens, G5 Mini Bi-Pin Base Color/Finish: Natural Color Temperature: 3,500K Average Lifetime: 20,000 hours Lumens (light output): 1850 G5 mini bi-pin base