28 Watt, 2,800 Lumen, 4100 Kelvin, 82 CRI, 24,000 Average Rated Life Hours, Mini Bi-Pin Base Not Dimmable High performance tri-phosphor used in T5 lamps for maximum brightness and color rendering 20 - Fluorescent T5 Cool White Linear Light Bulbs Bulbrite's Energy Wiser T5 Fluorescent bulbs offer high performance tri-phosphor for maximum brightness and color rendering, long life, and energy savings making them the ideal solution for commercial, industrial, sign and display applications.