When light switch 100 is turned ON by a user, a switch contact inside light switch 100 is closed, allowing a current to flow through each of the light fixtures, thereby illuminating a respective illumination device, such as a light bulb, installed into each of the light fixtures. The term “illumination device” may refer to any light-emitting device, such as an incandescent light bulb, a fluorescent light bulb, an LED light bulb, or almost any light-emitting device that uses electricity in order to provide illumination. In this arrangement, all three lights are illuminated by turning the light switch 100 ON, and all three lights are extinguished when the light switch 100 is turned OFF. There is no way to turn only one or two lights ON or OFF.
With reference to