Luxrite LR20740 (2-Pack) F32T8/735 32-Watt 4 FT T8 Fluorescent Tube Light Bulb, Natural 3500K, 2850 Lumens, G13 Medium Bi-Pin Base Color/Finish: Natural Color Temperature: 3,500K Average Lifetime: 13,000 hours Lumens (light output): 2850 G13 medium bi-pin base