With their photoelectric cells, these switches will turn your outdoor lights on at dusk and off at daybreak automatically, even when you re not at home. It s a great convenience and an energy saver. You never have to worry about accidentally leaving a light on all day. Electronic Timers for Lamps and Appliances Electric timers improve home security and can be a great energy saver, too. They can be programmed to turn lights and small appliances on and off at designated times.
Most timers are easy to install and are available for window air conditioning units.
Now there s no need to keep your window air conditioner running while you re away from home. Program the timer to start your air conditioner just before you plan to return, and your home will be cool and comfortable when you arrive. Department of Energy .