Many cities are replacing their incandescent traffic lights with LEDs, despite the higher initial cost. Here's why that's ...

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

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.

Light-emitting diodes (LEDs) are so ubiquitous that it's easy to forget just how much society relies on these underappreciated technological wonders. Yet, the history of the LED goes back further than ...