Dimmer switch, a type of wall light switch that allows for adjustable light intensity. - Black

Dimmer switch, a type of wall light switch that allows for adjustable light intensity. 
Function: It controls the brightness of a light by varying the electrical current supplied to the fixture. 
Mechanism: Unlike standard on/off switches, rotary dimmers use a rotating knob to gradually adjust the light output, indicated by the light bulb icon and the graduated scale on the switch face. 
Benefits: Provides flexibility in lighting control, allowing users to create different ambiances and potentially save energy by reducing light output. 
Installation: Installed in a wall-mounted outlet box, similar to standard light switches, and connected to the light fixture's wiring.