Lutron Hi-Lume 3D electronic ballasts are designed to meet the most challenging demands of architectural lighting. These industry-leading ballasts provide full-range, flicker-free dimming down to less than 1 percent to create the ideal visual atmosphere in any environment. The Lutron H3D T817 C U 1 10 operates 17-watt T8 linear or U-bent fluorescent lamps. It uses a programmed start method to ensure that lamps reach or exceed their rated lifetimes, and it uses over 95 percent of its power supply to promote maximum efficiency. This product is backed by a 3-year limited warranty and is both UL and CSA certified.