Luxrite LR20790 (2-Pack) F39T5/835/HO 39-Watt 3 FT T5 High Output Fluorescent Tube Light Bulb, Natural 3500K, 2925 Lumens, G5 Mini Bi-Pin Base Color/Finish: Natural Color Temperature: 3,500K Average Lifetime: 20,000 hours Lumens (light output): 2925 G5 mini bi-pin base