GE’s 14-Watt T5 Bright White Fluorescent bulbs provide bright white light with a neutral color tone. They provide neutral white multi-purpose lighting for a variety of home and commercial spaces. These bulbs are rated to last 13 years based on 6 hour per day consumer use. Use these 21.6-inch long fluorescent bulbs with a 5/8-inch diameter (Compatible to Linear Fixture size SG5-14 Dimensions: 22-3/4"L x 3/4"W x 1-1/2"H)