Luxrite LR20765 (2-Pack) 54-Watt 4 FT T5 High Output Fluorescent Tube Light Bulb, Daylight 6500K, 4200 Lumens, G5 Mini Bi-Pin Base Color/Finish: Daylight Color Temperature: 6,500K Average Lifetime: 20,000 hours Lumens (light output): 4200 G5 mini bi-pin base