Triangle Bulbs T30023 - F8T5/CW, 8 Watt, T5, 4100K Cool White, 12" Straight Fluorescent Tube Light Bulb These lamps feature high performance tungsten filaments which produce a brighter, whiter light fluorescent F8T5/CW Cool White 12" Straight T5 Fluorescent Tube 12,000 Life Hours, G5 Mini Bi-Pin Base Ultra Bright Color 4100K, Cool White 420 Lumens, CRI: 85