Light symbolizes hope or something bright is coming along the way. But sometimes, light might affect the our wellness especially the quality of sleep when we allow to sleep with the light on all night long.
Source
The Study
According to the study conducted in South Korea, researchers found out that those who sleep with inches closer with a switched on fluorescent lamp had many intermittent wake up cycle during their sleep and developed a shallow sleep during the coarse of the study then feeling some exhaustion when they woke up. They believed that lights affect the brain oscillations that are connected with sleep depth. On the other hands, those who were subjected to sleep with lights off through out the night, they reported a good sleep and feeling of good energy at early morning. So they cocncluded that in order to have a good quality of sleep, try to minimize the source of light that might disturb your mind. Use blinders low luminiscene light. Have you wonder that most of the bar, you can find a very bright light that even make you blind if you stare it for seoconds? This study gives you the related principle to it. The bar manager wants you to enjoy your night with friends at the party by simply putting you alive in the middle of the night with the help of these blinding white lights. No wonder why you dance and drink all night with all your nearly empty energy. But sometimes, you just simply drop yourself in the crowd because of being overdrunk. Well, that the exemption to the rule, because being sleep and drunk are two different things.Source