The dark side to bright light - solar led street light

Electric lights have changed our society and life since they were invented more than 130 years ago.
Light enables us to lead a 24/7-
A daily lifestyle that provides us with time agents to work, sleep, eat, play and interact with goods and services.
Through our lifestyle choices, we are exposed to light (
Use of electronic devices at night), our housing (
Urban light pollution)
Through our workshift-
Workers engaged in morning, evening and night shifts).
Although it is indisputable that electric lights bring us many benefits, it is fundamentally unnatural to expose to electric lights at night and may have a negative impact on our psychology and physiology.
Many studies have shown that light at night has a negative effect on sleep and our circadian rhythm (
Driven by our 24-hour clock).
These changes are associated with negative health outcomes such as obesity, diabetes, and perhaps even some types of cancer at greater risk.
Light has a great impact on our biological clock, and the biological clock has a great impact on our brain and body operations.
The main biological clock is located in the area of the brain called the lower part of the visual Hill. every day, this clock is related to 24-
The light felt through the eyes, one hour a day.
Before the invention of the electric light, our daily light and darkness were mainly provided through the solar cycle.
Light sources like fire and candles can only provide very low light.
This is the case of the vast majority of human history, and our biological clock evolved in animals for hundreds of millions of years to adapt to a natural day of changes in light levels within 24 hours.
But it was artificially extended by electric lights for a day. at-
Exposed at night, our circadian system is at risk of destruction.
The circadian system is most sensitive to light at night and most insensitive to light during the day;
Exposed to light, late night can cause the clock to become later (a so-
Called "phase delay ")
This may be manifested in late sleep and short sleep. Further, light-at-
Night exposure inhibits sleep
Promote the hormone melatonin, which is secreted from the pineal gland rhythmically at night.
Evidence provided by shift staffat-
Contact with various diseases at night. Long-
Long-term exposure to shift work (
For example, up to 20 years)
Related to increased lifelong risk of depression. Shift-
Work may also be a risk factor for the development of certain types of cancer, with a designated shift of 2007.
Although the impact on shift workers is complicated, it is likely that the light isat-
Night is an important factor leading to adverse results. However, shift-
Workers account for only 15-20 percent of the working population, light-at-
The night of our home
The environment is affecting our sleep and health.
We are often exposed to low levels of light. at-
Reading, communication and entertainment at night through light pollution, home lighting and the use of electronic equipment.
More than 90 percent people use some sort of lighting one hour before trying to fall asleep.
People have recently started using e-commerce.
Readers, smartphones and tablets before going to bed can delay sleep, disrupt the circadian rhythm, and suppress melatonin, compared with people who read traditional books, shorten sleep time and reduce alertness the next morning.
The light from devices such as smartphones and tablets is particularly rich in the short term.
The circadian rhythm system is particularly sensitive to wavelength blue light, so the use of electronic devices may be an important cause of sleep disorders and sleep disorders in insomnia patients, which in turn is considered to be an important predictor of physical and mental health problems.
Of course, we can choose not to use our tablets and phones at night, so that we can exert a certain degree of control over the amount of exposure to light --at-night.
However, we have much less agency in terms of the level of lighting in the outdoor environment.
Today, more than 80 percent and 99 percent of the population living in the United States and Europe have experienced mild pollution.
From street lighting to high illumination LED retail lighting, the urban area is illuminated by various forms of light.
This light has the potential to invade an individual's living place and sleeping environment.
More than 19,000 participants found that those living in areas with more outdoor night lighting reported less sleep quality and quantity and greater daytime drowsiness.
In addition, live in areas with high outdoor light-at-
Night is associated with increased depressive symptoms and the likelihood of suicidal thoughts.
Taking into account the health consequences of public lighting at night is timely as our public lighting infrastructure is being updated to improve energy efficiency, but it is also possible to improve health levelsdisrupting LED-based lighting.
This issue is currently being studied.
These projects are designed to better understand the main light sourcesat-
The night in the home environment and whether the individual perceives the lightat-
Nights that affect their sleep, cognitive function, physical and mental healthbeing.
In addition, this study aims to find out if our geographical location on lightsat-night exposure.
To seek answers to these questions, we are looking for participants to do the work and will attach great importance to your contribution. ibution.