Luxrite LR20831 (2-Pack) F21T5/841 21-Watt 3 FT T5 Fluorescent Tube Light Bulb, Cool White 4100K, 1850 Lumens, G5 Mini Bi-Pin Base Color/Finish: Cool White Color Temperature:, 4,100K Average Lifetime: 20,000 hours Lumens (light output): 1850 G5 mini bi-pin base