What is blue light? The effect blue light has on your sleep and more
HARVARD.EDU -- At night, light throws the body's biological clock -- the circadian rhythm -- out of whack. Sleep suffers. Even a mere eight lux -- a level of brightness about twice that of a night light -- affects the circadian rhythm, notes Stephen Lockley, a Harvard sleep researcher. Worse, research shows that disrupting the circadian rhythm may contribute to the causation of cancer, diabetes, heart disease, and obesity. Blue wavelengths seem to be the most disruptive at night and the proliferation of electronics with screens, as well as energy-efficient lighting, is increasing our exposure to blue wavelengths. Protect yourself from blue light at night: Avoid looking at screens (TV, computers, tablets, mobile devices, etc.) beginning two to three hours before bed. If ...