India, Oct. 24 -- As the sun goes down, we switch on the lights indoors, from overhead to lamp lights. At the same time, bright lights from the street illuminate homes. Screens add to these lights, from television to phones. True darkness, in fact, at night, these days is rare. This comes at its own health cost. Either the lights are pouring in from the streets because of the rampant urban light pollution, or our own screens and overhead lights.

A study published in the JAMA Network on October 23, 2025, found that bright light exposure at night may weigh heavily on your heart health.

This habit of brightly illuminating the home at night not only affects circadian rhythm but also heart health. The study's findings show that when the body...