Find the perfect Lutron Hi-Lume 3D dimming ballast for any space at Pro Lighting. These fluorescent dimming ballasts come with a worry-free five-year warranty. Our H3DT817CU110 fluorescent dimming ballast is designed for one lamp, providing programmed rapid start technology for a faster reboot. Each F17T8 has a dimming range of 100 percent to 0.7 percent. Lutron's Hi-Lume 3D technology offers the dimming power you want without any noise or flickering.