Q: I want to replace a ceiling light fixture. How do I do it? A: Switching out a ceiling light fixture is often fairly simple: Turn off the power to the circuit, climb a ladder and remove the old ...

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

Henry Caratura was kind enough to share this photo with us. He found this on a rehab job where he rewired the whole house. “When the plug is plugged in, the outside light comes on,” says Caratura.