Traditional slide dimmer actuation allows light levels and mood to be adjusted at the touch of a finger - with or without the lights on. Add atmosphere and save money with dimmers. With a dimmer switch, less is more-more money, that is. Dim your lights by a quarter, and you increase your energy savings by 20 percent; dim them by half, and increase your savings 40 percent. You also extend bulb life up to 20 times when you dim a bulb halfway.