Blue light has acquired a dubious reputation in recent years, frequently blamed for everything from disrupted sleep patterns to digital eye strain. This high-energy light, emitted abundantly by our ...

This real-world study shows that recent and habitual light exposure are linked to lower subjective sleepiness and faster reaction times in daily life. Brighter and more stable daytime light patterns ...

(CNN) — Turning off the lights at night has long been known to support restful sleep, but new research suggests it may have another significant benefit. Sleeping in total darkness may lower the risk ...

LED lights have taken over modern homes and workplaces. They're energy efficient, affordable, and marketed as the future of ...

Good sleep hygiene calls for, among other things, a cool, dark and relaxing environment. It turns out the dark part is key to helping prevent heart disease. People who are exposed to more artificial ...

Bright outdoor light exposure at night is associated with an increased risk of heart disease, according to an October study published in the Journal of the American Medical Association. Light at night ...

A new study has an important implication for tweens and young teens as they head back to school: Taking a gadget to bed could really hurt their sleep. Enough light exposure at night can keep anyone ...

Most people associate mental sharpness with sleep and breaks. New research suggests, however, that light may also play a ...

Light could suppress the sleep hormone melatonin. Sleeping with a cellphone, bright alarm clock on or a television next to your bed puts women at risk for weight gain, a new study found. Women who ...

“Changes in circadian rhythms happen with aging, and evidence suggests that circadian rhythm disturbances may be a risk factor for neurodegenerative diseases like dementia,” said Dr. Wang.