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

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 ...

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 ...

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 ...

Their inventions have found their way into bedside lamps, television screens, and smartphones, and have the potential to give light to the 1.5 billion people who don't have access to electricity grids ...

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 ...

You might have come across articles saying that the LED light bulb emits blue light which causes a myriad of harmful effects including damage to the retina, macular degeneration and disturbed sleep ...

Select an option below to continue reading this premium story. Already a Honolulu Star-Advertiser subscriber? Log in now to continue reading. >> A large band gap means higher-energy photons, which in ...