Replacing a standard wall switch with a dimmer is a simple upgrade that delivers big impact at minimal cost. Dimmer switches make it easy to customize light levels for any room, occasion, or mood - whether you're entertaining, reading, or settling in for movie night, the right lighting sets the tone. The Leviton Trimatron Rotary Dimmer offers full-range dimming for dimmable LED, incandescent, and halogen bulbs. Traditional in appearance, it turns lights On and Off with a twist of the knob, and brightness can be adjusted by continuing to rotate to your desired level.