These lighting controllers require no new cabling. The newest types of lighting-control systems to hit the market use no wire at all. Keypads communicate with lamps and switches over radio-frequency airwaves. Because no wiring is required, wireless systems are easy to install and expand. Control The simplest type of lighting-control system requires little more than a few small boxes plugged into standard wall outlets.
Controllers are available in a range of styles.
The most basic is the pushbutton console. Each button of the console can send an on, off, brighten, or dim signal to various switches and modules. Granted, there's nothing automatic about the operation of the lights, but it is much more convenient to switch off the house lights from a bedroom console than to run downstairs and switch them off manually. Slightly smarter are controllers with built-in timers or sun sensors. A timer-operated console can be set to switch off select lights automatically at certain times of the day, while a sun sensor tells the console to switch them on and off according to the rising and setting of the sun.