Do LED lights cause cancer? Can they really reduce crime? One kid is so concerned about LED streetlights that he called Mayor Rahm Emanuel. Chicago sixth-grader JJ Nnawuchi loves looking at the stars, ...

In many cities today, streets are lit by white lights, screens show vivid colors, and buildings glow with precise patterns of illumination, all depending on a small but important invention from the ...

Three researchers helped revolutionize lighting with vastly better energy efficiency and brightness. The light-emitting diodes also are used in data storage, TVs and smartphones. Stephen Shankland ...

The blue light in LED lighting that is increasingly used in our homes can damage the eye’s retina while disturbing our biological and sleep rhythms, a French health authority warned in a new report.

With the invention of the first LED featuring a red color, it seemed only a matter of time before LEDs would appear with other colors. Indeed, soon green and other colors joined the LED revolution, ...

Your support goes further this holiday season. When you buy an annual membership or give a one-time contribution, we’ll give a membership to someone who can’t afford access. It’s a simple way for you ...

If you’ve played around with “white” LEDs, you already know that there’s no such thing. There’s warm white and cool white and any numbers of whites in-between. And when white LEDs were new, the bluer ...

Several pieces of evidence have suggested that blue light can inactivate various pathogenic bacteria. Previously in vitro and in vivo studies using blue light in the spectral range of 400–470 nm ...

Thomas Edison may have invented the lightbulb, but he never received the Nobel Prize for it. Isamu Akasaki and Hiroshi Amano at the University of Nagoya, and Shuji Nakamura working at Nichia Chemicals ...