Replacing a light switch is very easy. There are a few different kinds. Before installation, make sure to turn off the power.

Or flip a switch at the bottom of the stairs, and then again at the top. The next person, coming from either direction, must be able to turn the light on again. That’s where 3-way switches come in.

We show the single switch but there are also three-way dimmers, CFL and LED dimmer switches. The post How to Install a Dimmer ...