For decades now, researchers have shown how important sleep is to a wide host of things in our lives — our mood, our memory, our concentration, and to help the body rejuvenate after a day of work and consciousness. Everybody knows that in order to be at our best, you need a good night’s sleep of between 7 and 8 hours (although the exact number varies).
Any less, and it’s the equivalent of giving yourself a daily handicap — making your life harder than it has to be. (Any more and it also doesn’t really benefit you.)
Now researchers have discovered that one of the things that may be contributing to our lack of of quality sleep is artificial lighting. Light seepage coming in from outside (like a streetlight) or coming from inside your bedroom — such as leaving a TV or computer on — appears to affect our mood over a period of four weeks.