32 Watt, 2,850 Lumen, 3000 Kelvin, 82 CRI, 20,000 Average Rated Life Hours, Medium Bi-Pin Base Not Dimmable Instant and rapid start; delivers up to 95 percent lumen maintenance 10 - Fluorescent T8 U-Tube Warm White Light Bulbs Bulbrite's Energy Wiser T8 Fluorescent U-tubes provide high light output and long life, making them perfect for commercial and industrial applications.