When you flip a switch or power up your smartphone, the last thing on your mind is whether that light could be messing with ...

No you're not imagining it. Headlights have gotten brighter, and people driving on dark roads since the start of Daylight Saving Time have felt the impact. Before LED lights were introduced, many auto ...

Call it the fifth generation of light—the availability of electric lights that promote health and well-being by automatically mimicking the natural cycle of light. They switch between blue-rich ...

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, ...

This illustration demonstrates how bright blue LED light, shone through its complementary yellow phosphor, yields white light. Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of ...