Daytime light exposure had a greater impact than evening light on the students, the study showed. Each hour of daytime light moved up the students' circadian phases by 30 minutes.

As the world population ages, medical researchers are looking for ways to help community-dwelling residents get better sleep.

We already know a good night’s sleep has a lot to do with your circadian rhythm. To get that rhythm on track, experts say it helps to expose yourself to plenty of light during the day. Just like ...

Two hours of evening reading on a self-luminous tablet vs. reading a physical book does not alter sleep after daytime bright light exposure. Sleep Medicine, 2016; DOI: 10.1016/j.sleep.2016.06.016 ...