Dimmers are devices connected to a light fixture and used to lower the brightness of light. By changing the voltage waveform applied to the lamp, it is possible to lower the intensity of the light output.

How does a dimmer switch work?

A dimmer switch changes the direction of electrical flow every time that it is used to dim or brighten the lights. ... Ultimately, the dimmer switch controls the electrical cycle for dimming a light. When the switch is turned down low the cycle takes longer to complete, and the light emits a lower level of brightness.

What is a reason for installing a dimmer switch?

Dimmer switches allow you to set the mood, help save on electricity and extend the life of your light bulbs. Learn how to install one in your home.