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 ...

Furthermore, this LED light is much bluer than sodium light and previous research shows that nighttime exposure to blue light can have negative effects on people’s circadian rhythm and sleep. There is ...

Blue light from LED lamps and consumer electronics can mess with your sleep because it disrupts production of the natural sleep hormone melatonin. Tinted glasses or displays in night mode can mask, ...

However, the findings show LED lights give off more blue light emissions. Blue light has shorter waves (ranging from 450 to 495 nanometers) that provide more energy and a cooler color than other ...

The American Medical Assn. warned in 2016 that high-intensity, blue-rich LED lights were “associated with reduced sleep times, dissatisfaction with sleep quality, excessive sleepiness, impaired ...

One is to combine tiny LED lights that each emit red, green or blue into a single big device. The other is to use only blue LEDs but coat them with a type of fluorescent substance called phosphor.