These days we’re pretty much constantly surrounded by light, with the artificial glow of indoor lighting, street lights, computer screens, smartphones, and TVs meaning night time is a lot less dark than it once used to be.But it looks like the convenience of ever-present illumination could come at a serious cost, with new research in mice finding that exposure to too much light has a serious impact on health, after animals are removed from the natural cycle of a day/night routine.
http://www.sciencealert.com/scientists-have-found-a-worrying-effect-that-artificial-light-might-have-on-our-bodies