They’re in your phone, TV, car headlights, remote controls—even traffic lights. LEDs (Light Emitting Diodes) are everywhere. But how do these tiny components turn electricity into light? In this video ...

LED bulbs promise to last for decades, yet many homeowners find themselves replacing them far sooner than expected.

Should you spend some time around the less scientifically informed parts of the internet, it’s easy to find “Free power” stories. Usually they’re some form of perpetual ...