11/21/2025
"Here are a few ideas for creating an optimal darker sleeping environment:
Cover your windows — If you have curtains or shades, close them tightly. If they do not block out external light, consider acquiring blackout curtains. A lower-cost alternative is to cover windows with aluminum foil to block light.
Close the gap — The gap between your bedroom door and the rest of your home can leak considerable light into your sleeping area. Try turning out other lights beyond the door, or push a rolled-up towel against the gap to block unwanted light.
Wear a sleep mask — Some people find sleeping with an eye mask comfortable, and, if the mask fits well, this can be an effective way to keep out light."
Exposure to light during sleep is associated with an increased risk of cardiovascular disease, according to a new study. During sleep, ambient light causes brain stress that is known to result in arterial inflammation, often leading to heart attack and stroke.