If you’re someone who can’t sleep without a nightlight, the TV glowing in the background, or your bathroom light peeking under the door, you might want to sit down. Preferably in total darkness.
A new study out of the U.K. just dropped a shocking bedtime bombshell: sleeping with even a little light on might seriously mess with your heart. Like, heart attack level mess.
Researchers strapped wrist sensors to 90,000 adults and tracked how much light was in their bedrooms at night. The average age of the participants? 62. So, no need to yank the nightlight out of your kid’s wall socket just yet – this study focused on the 40+ crowd.
Bright bedrooms increase your heart attack risk by 47%
People who slept in total darkness were the least likely to have heart issues. But folks with bright bedrooms (we’re talking overhead lights, TVs blasting, glowing electronics) had a 47% higher risk of heart attacks.
Yes, even nightlights had a deadly effect
Even those in “moderately lit” rooms – like with a nightlight or that TV you “accidentally” fall asleep to – had a 20% higher risk. So yeah, turns out your cozy little bedtime setup might be sabotaging your arteries.
What counts as “moderate light”? Think soft nightlights, your phone screen lighting up every time someone likes your cat photo, or the bluish glow of a paused Netflix screen. Apparently, your body isn’t chill about any of it.
Why is light at night so bad for you?
Previous studies have found that light messes with your circadian rhythm, reduces melatonin, and keeps your nervous system a little too alert for comfort. Your heart’s like, “Can I please get some peace and quiet in here?”
So if your bedroom looks like a low-budget spaceship at night, it might be time for a glow-down. Maybe consider some blackout curtains, cover your electronics, or at least set that sleep timer on your TV.
Whatever you do, don’t worry so much about that monster under the bed. Your nightlight might be the true villain. Sweet dreams!
