Kichler Lighting 10083FST Direct Wire 21W 120V Linear Fluorescent Replacement Lamp can be used with compatible Direct Wire undercabinet fixtures to replace bulbs when they are needed – Not Dimmable. The 10083FST is 33.5IN long x .63IN in diameter. The 10083FST comes one package. Since 1938, Kichler Lighting has offered a distinctive array of lighting solutions that reflect your individual personality, tastes and plans. Kichler brings you an unparalleled variety of exciting style families, unique finishes, fresh colors and unequaled quality. Whether it"s casual, contemporary, transitional or traditional, you"ll find it with Kichler, lighting that defines your style.