Turn out the lights for a good night of sleep: this seems like common sense, but many Americans don't actually follow it. New research shows it doesn't take much light at night to hurt our health.

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Sleeping with a light on can play havoc with insulin levels and consequently impair the response to glucose, a two-night sleep-lab study of 20 people indicates. "The most important finding" is that ...

Gear-obsessed editors choose every product we review. We may earn commission if you buy from a link. Why Trust Us? “The results from this study demonstrate that just a single night of exposure to ...

If you’ve ever sat rocking your toddler to sleep in the dark or fumbled through a dimly lit diaper change, you know how useful it is to have a good night light. But the best night lights are more than ...