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How Blue Light Affects Biological Clock: Even though LED and other artificial lights are considered environmentally friendly, the blue light emitted from them can have a negative impact on sleep and increase the risk of diseases. Harvard Medical School According to a research paper published in, before the advent of artificial light, the sun was the main source of light and people used to live in darkness to a great extent in the evening, today the situation has changed, in the evening there is light all around and we accept it as normal.
But we may have to pay the price of this light in the form of health. Light at night disturbs the body’s biological clock i.e. circadian rhythm. This affects sleep and research shows that in the future it can also cause problems like cancer, diabetes, heart disease and obesity.
What is blue light?
Not every color of light has the same effect. Blue wavelengths are beneficial during the day, they improve attention, reaction time and mood. But this blue light proves to be the most harmful at night. With the increasing use of electronic devices with screens and energy-efficient lighting, the time spent exposed to blue light after sunset is continuously increasing.
light and sleep
Every person’s circadian rhythm is slightly different, but on average it is about 24 hours 15 minutes. The biological clock of those who stay up late at night is slightly longer, while that of those who sleep and wake up early is slightly shorter. Dr. Charles Geisler of Harvard Medical School showed in 1981 that natural daylight keeps the body’s internal clock in sync with the environment.
Are night lights really harmful?
Some studies have indicated that exposure to light at night, such as working night shifts, may be linked to diabetes, heart disease and obesity. However, it has not been completely proven that night light is the direct cause of these diseases, and the reasons behind it still need further research.
What is the problem with LED?
Vision Lighting According to , LED lights have a very rapid on-off flicker, which the eyes cannot see, but the brain senses. This can increase eye fatigue, headache, irritability and restlessness at night. Blue light, on the other hand, signals the brain that it is day and suppresses the melatonin hormone. Research shows that exposure to blue light at night delays sleep. This is the reason why bright LED lights in modern homes are increasing sleep problems.
Also read: Why do some people become thin even without diet and going to the gym? know the reason
Disclaimer: This information is based on research studies and expert opinion. Do not consider this as a substitute for medical advice. Before adopting any new activity or exercise, please consult your doctor or relevant specialist.
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