A light switch is the simplest of electrical devices. Flip the switch, electricity flows. Flip it again, electricity stops.

Archaic light switches might as well be from the stone age. All they do is turn a light on and off. They can't dim lighting gently or remember the brightness level you prefer. Outdated switches don't ...

Q. I installed a dimmer switch in my dining room and now the chandelier only works half the time. There are two switches in the room that control the light. They worked fine before I started the job.

Q: At either end of my staircase I have a light switch that turns the staircase light on and off. The problem is that the switches don’t work correctly anymore ...

Interplay Learning’s on-demand course, “Diagnosing Circuits: Three-Way Lighting,” introduces multi-location light control to expand a technician’s skills and knowledge of electrical circuits and ...

Q: Tim, I need you to mediate a dispute between my husband and me. We're building a new home, and there are several places where two or more switches can be used to control lights. I like the ...

A conference room has a pair of three-way switches for the overhead lights. One switch is located at the south entrance, and one is located at the north entrance. The south entrance is the one ...