A dimming switch is a device that allows users to adjust the brightness of lights in a room. It works by controlling the amount of electrical current that flows to the light fixture, enabling a range of brightness levels from very dim to fully bright. Dimming switches can be used with various types of light bulbs, including incandescent, LED, and CFL bulbs, depending on the switch's compatibility. These switches are often installed in place of standard light switches and can enhance the ambiance of a space. By dimming the lights, users can create a cozy atmosphere for activities like watching movies or dining, while also saving energy when less light is needed.