Sleeping with even a little light can be unhealthy, study finds

Just a night or two of exposure to faint light is enough to raise your pulse and increase insulin resistance — factors that increase the risk of heart disease and diabetes, researchers find.

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Bedtime procrastination - Wikipedia

Light exposure during sleep may harm your health, study says – The Hill

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Does exercising at night affect sleep? - Harvard Health

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Why falling asleep with the lights on is bad for your health - The Washington Post

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