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

This year's Nobel Prize in physics went to scientists who invented the blue light-emitting diode. Paired with solar power, the energy-efficient... When the news broke Tuesday that three scientists ...

To be more energy efficient, many people have replaced their incandescent lights with light-emitting diode (LED) bulbs. However, those currently on the market emit a lot of blue light, which has been ...

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