The IPI06 is designed to control incandescent lights only. There may be some compatibility with LED or CFL bulbs that were designed to work with traditional, forward-phase dimmers, but we recommend you check with your LED manufacturer for their recommended dimmer. You may want to look into the IPL06-10Z which has been designed with dimmable CFL/LEDs in mind. You can find more information regarding our Universal dimmer product line at www.leviton.com/universal. A list of compatible LED bulbs can be found here.