Light bedrooms 'link to obesity' Continue reading the main story Related Stories Body Clock: What makes you tick? Doctors unite to combat obesity What are the health risks of obesity? Sleeping in a room with too much light has been linked to an increased risk of piling on the pounds, a study shows. A team at the Institute of Cancer Research in London found women had larger waistlines if their bedroom was "light enough to see across" at night. However, they caution there is not enough evidence to advise people to buy thicker curtains or turn off lights. The study of 113,000 women was published in the American Journal of Epidemiology . The women were asked to rate the amount of light in their bedrooms at night as: Light enough to read Light enough to see across the room, but not read Light enough to see your hand in front of you, but not across the room Too dark to see your hand or you wear a mask Their answers were compared to several...