People who live in areas with more intense outdoor nighttime light radiance are more likely to go to bed after midnight, get fewer than 6 hours of sleep, and be dissatisfied with their sleep, compared with people who live in areas with less intense nighttime light radiance, according to research presented at the 68th Annual Meeting of the American Academy of Neurology. The researchers noted that if this association between outdoor nighttime light exposure and changes in sleep habits is confirmed by other studies, people may want to consider room darkening shades, sleep masks, or other options to reduce their exposure to nighttime light. An overview of the research is available at Neurology Reviews: http://www.neurologyreviews.com/the-publication/issue-single-view/nighttime-light-radiance-affects-sleep/d1f539419c140f8f9c536881cdb1d3d5.html.