Porch lights come in all colors and meanings, but why does your neighbor's porch turn purple in October? The reason is ...

Instead of appearing white to the common driver, they could give off a violet or even full-on purple light. This is nothing compared to the biggest downside of LED lighting, but it's still a ...

According to Scientific American, the purple hue isn’t exactly intentional. For years, cities have been upgrading public lighting infrastructure, going from sodium lamps to LED (light emitting ...