Mar 28 , 2019We all know that darkness is essential for a good night’s sleep. Few, if any people sleep with the lights on and most of us shudder at the thought. As obvious as it is that we need darkness to sleep, it’s easy to overlook the other ways in which light affects our sleeping habits. To put it simply: darkness makes us tired and light tends to keep us awake. But in recent years, scientists have discovered that it’s a little more complicated than that. Here’s everything you need to know about how light and the lack of it affect your sleeping habits.