a day after rain

Physiologically, sleep is a complex process of restoration and renewal for the body. Sleep is believed to be important in many physiologic processes including the processing of experiences and the consolidation of memories.

Sleep with the lights on

Sleep with the lights on is not recommended. There are people who sleep with the lights turned on. They do it because it was accustomed to do so or because nyctophobia (fear of darkness). There is almost no profit if sleeping with the lights on, except for people with nyctophobia. For them, he will not be able to sleep with the light off and somehow this can be tolerated. For people who need light at night, make it as low as possible. Children who sleep with the lights on at risk of leukemia. The scientists found that the body needs in a dark atmosphere to produce cancer-fighting chemicals.Even when turned on the light toilet, stayed up late, traveling, street lights can stop the production of melatonin substances.

Sleep with the lights off

Sleep with the lights off is recommended. It will bring you so many advantages. By turning off lights when you sleep at night, not only saves energy but also improve the health of the body. Sleep with the lights off will hinder the recovery of the immune system so most people who have a habit of sleeping with the lights on will be more easily hurt
rather than people who sleep without lights off. While the lights off, our body can produce melatonin, a hormone that is able to fight and prevent various diseases including breast cancer and prostate cancer. If we turn off the lights while sleeping, of course difficult for us when awakened at night because we wanted to go to the bathroom or something else. We can just drop something or hit the table because it was dark. Turn off lights when sleeping hard done by people with nyctophobia.

Hormone Melatonin

The hormone melatonin, which is also called “hormone of darkness” is a substance produced by the pineal gland in the brain and its formation will be triggered by the dark. The highest levels are found before the early morning at around 02.00-04.00 AM and lowest in the afternoon. *Benefit of melatonin are as anti-oxidants which fat soluble and water, increase the body's immune cause muscle relaxation, help to improve mood and eliminating tension.

*If these hormones decline in the quality of your sleep will decline too and the impact that is often experienced sleep rhythm changes and sometimes have trouble sleeping.

Prof. Russle Reiter from Texas University:

"Once you are asleep and do not turn off their lights for 1 minute. Your brain immediately detects that the light is on all day and the production of melatonin decreases substance.

Biologist, Joan Robert:

“The new body can produce the hormone melatonin when there is no light. This hormone is one of the immune hormone that is able to fight and prevent various diseases including breast cancer and prostate cancer.”