Family Practice Physician DR. HANIA ALAIDROOS joined Brad Davis to talk about Keeping a lot of light on while you snooze -- such as from a television or bright nightlight -- has been linked with an increased risk of weight gain and obesity. Specifically, sleeping with a television or light on in the room was positively associated with gaining five kilograms, or 11 pounds, over a five-year period among women in a new study published in the medical journal JAMA Internal Medicine on Monday. "There was a 17% chance of gaining the five kilograms -- after we adjusted for confounding factors," said Dale Sandler, a senior investigator at the National Institute of Environmental Health Sciences in North Carolina and senior author of the study. In addition, there was a 22% chance of becoming overweight and a 33% chance of becoming obese, she added.