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

You’ve likely heard that blue light from smartphone screens may be keeping you awake at night. While the sun is our main source of blue light, the rise of LEDs and screen use exposes us to artificial ...

ZDNET experts put every product through rigorous testing and research to curate the best options for you. If you buy through our links, we may earn a commission. Learn Our Process 'ZDNET Recommends': ...

We asked the experts about how screen time might interfere with sleep. We've sent this story to your inbox. Digital screens emit sleep-disrupting blue light, feed us instant and addictive ...

Blue light is a high-energy light that the eyes absorb from computers, smartphones, LED lights, and fluorescent lights. The sun is the biggest source of blue light. On a sunny day, it's 100,000 times ...