Elana Scherr: These LED Headlights Are Too Bright What Are HID Headlights? Replacing a broken headlight is—in most cases—a reasonably easy thing to do on your own. Not only will doing this task ...

Many people believe that the LED was discovered by US researchers working in the 1960s. In fact, Henry Round at Marconi Labs noted the emission of light from a semiconductor diode 100 years ago and, ...