White Plug-In DimmerThis White Plug In Dimmer Switch doesn't need to be installed. All you need is to plug it into a standard Type I power socket, plug your LED lamp onto the dimmer's own socket, and turn the rotary knob to adjust the light's brightness. Think of it as a short single socket extension cordwith a dimmer. This is especially handy if you want to use a dimmer to set the ambience of your dimmable LED bulbs or incandescent festoon string but you can use it for