Century 150-watt LED and CFL/600-watt Incandescent Wall Slide Dimmer Future-proof to control a variety of dimmable CFL and LED lamps, CFL and LED Lamps must be dimmable. Slider control lever: Move lever upwards to brighten and downwards to dim Turner: Turn to adjust the minimal brightness of the lighting CFL 150W LED 150W Incandescent halogen 600W The minimum dimmable LED watts request is 20W, The Dimmer switch can work with above 20W.