Sleeping with even a little bit of light isn't good for your health, study shows
NPRSleeping with even a little bit of light isn't good for your health, study shows Enlarge this image Klaus Vedfelt/Getty Images Klaus Vedfelt/Getty Images Turning off the lights and closing the curtains isn't exactly a catchy, new sleep hygiene hack, but this common sense advice is gaining even more scientific credibility. "I was surprised that even this fairly, I would say, small amount of light just getting through the eyes to the brain still had such notable effect," says Dr. Phyllis Zee, senior author of the new study and director of the Center for Circadian and Sleep Medicine at Northwestern University. "There's a lot of coordinated actions that have to occur in order for us to get a good night's sleep and the autonomic nervous system balance regulates that," says Colwell. "When we did not increase their exposure to artificial light at night, we did not see adverse effects of chronic sleep deficiency on glucose metabolism," he says.
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