Leviton 6674-P0W SureSlide Universal 150-Watt LED and CFL/600-Watt Incandescent Dimmer, White Future-proof to control a variety of dimmable CFL and LED lamps. Frequency: 60 Hz Integrated linear full-range slide control for easy, precise operation. Backwards compatible with incandescent lamps CFL mode for dimmable CFLs. This feature provides a higher starting voltage that is required for many Compact Fluorescent Lamps LED/Incandescent mode provides optimized dimming for LED lamps and for incandescent operation Troubleshoot-lights flickering is due to lamp has a bad connection. Cfl and led flickers at low end of dimming range can be resolved by increasing the low end of the dimming range