India, Aug. 31 -- Do you have a habit of sleeping with your curtains open, letting the street lamp's light dimly glow up your room? This habit may seem calming, but you may want to think twice, as it puts your heart health at risk. A study published in June 2025 revealed an interesting, even surprising, risk factor for heart disease: night light.

The study highlighted the importance of a dark environment for a good night's sleep, which, in turn, maintains good heart health. Exposure to night light affects heart health adversely. This is because our bodies depend on natural light to sleep and wake up. Other than managing bedtime schedules, this internal clock, also known as the circadian rhythm, controls many other bodily functions too, f...