In modern society we have the capability to prolong the light part of the day by using artificial lighting. Our bodies are not synchronized to the rhythm of the sun, but to our lifestyle. Many people extend their daily activities towards the evening, delay their bedtime and, in case of work or school obligations the next day, shorten their sleep. Insufficient sleep has an impact on daily functioning, and it is often only in weekends that people try to compensate for their shortage of sleep.
Reducing the amount of light during the last few hours before bedtime, and exposure to bright light in the early morning hours can support the timely onset of sleep and bring about more alertness and energy right from the start of the day.
By maintaining a regular lifestyle with only small variations in bedtimes, sufficient light exposure during the day, low light exposure during the evening and darkness during the night, you can achieve a good balance between rest and activity and reduce a variety of health risks.