10/13/2026
Quick bedroom check tonight: turn off the lights and look around.
Is there light sneaking in around the curtains? A phone lighting up with notifications? Those tiny glowing LEDs on chargers, TVs, and clocks?
New research in the European Heart Journal found that people exposed to more light at night had differences in their heart structure compared with people in near darkness. It’s an observational study, so it doesn’t prove light causes heart problems. But a darker bedroom is an easy, free thing to try, and it may help you sleep better too.
Blackout curtains, covering LEDs, silencing notifications, or a comfy sleep mask are all simple places to start.
We broke down what the researchers found and how to dim your room. Link in the comments.