Researchers have designed and tested ‘human-centric’ LEDs that emit different wavelengths of blue light depending on whether it’s daytime or nighttime, reducing the disruptive effect artificial light ...

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 ...

It’s hard to believe that the first blue LED didn’t arrive until 1993. They look simple, but looks are deceiving (Fig. 1). 1. Image showing a blue InGaN-based LED with gold wire contacts (0.4 × 0.4 mm ...

Living in a modern environment often means enduring a constant hum of background noise and physical vibration. From the rumble of heavy traffic to the oscillation of industrial machinery, these ...

Does a blue light keep you up at night? No, it’s not an alien invasion. The city of St. Paul has been gradually replacing LED street lights suffering from an unusual manufacturer’s defect — they’re ...