These Smart Light Bulbs Play Music, Boost Your Wi-Fi Signal, and More

As you probably know, LED bulbs are one of history’s greatest high-tech success stories. They use around 90 percent less electricity than incandescent bulbs, yet last 25 years or more. They turn on to full brightness instantly. They remain cool to the touch. They’re hard to break, and safety-coated if they do. They also contain electronics — which has sent clever inventors into overdrive. Since the circuitry in an LED bulb can be made very tiny, that leaves a lot of space inside to add chips that connect these bulbs to your phone and your home network.