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

Q:I have a three-way switch that controls the light at the top of the stairs. The switch at the bottom doesn't always work like it is supposed to. Sometimes when I turn it off, the switch at the top ...

A 3-way light switch can add convenience to large rooms, staircases, or any space where you may want to control the light from more than one place.

How to clean up spilled paint; 3-way switches 101; Installing a split rail fence. Mauro Henrique shares how he cleans up paint when some spills on the floor. Heath Eastman breaks down how 3-way ...