Stop walking across a dark room to turn on the light. Install a 3-way switch and control lights from two locations.

There are as many varieties of smart light switches (and dimmers) as there are light bulbs, and while the prospect of upgrading your old dumb switch might seem daunting, they’re usually pretty simple ...

Experts say the answer depends on the type of lighting, how long lights are left on, and whether smart systems are in place.

For decades, we’ve been guilt-tripped into turning off the lights any time we leave a room — but it turns out that “money-saving” habit might be a total bust. The U.S. Department of Energy has shed ...