National Anti-Junk Light Day

History of National Anti-Junk Light Day

Blue light is a type of ultraviolet radiation that was discovered in 1801 by the German physicist Johann Wilhelm Ritter. It was previously known as chemical rays but by the 19th century, it was formally known as ultraviolet radiation.

Despite a lack of supporting scientific evidence, blue light has been suggested as a possible cause of age-related macular degeneration. Currently, a 2019 report from France’s Agency for Food, Environmental, and Occupational Health and Safety (ANSES) backs up the 2010 finding of the negative effect of blue LED light on the eye, which can result in decreased eyesight. It emphasizes the short-term impacts on the retina associated with intense exposure to blue LED light, as well as the long-term effects associated with the start of age-related macular degeneration.

According to Harvard Health Publishing, exposure to blue light at night has a greater negative impact on sleep. This report is supported by a 2016 American Medical Association article highlighting the detrimental health effects of unrestricted usage of LED light for public lighting.
According to a news release issued by the American Medical Association on June 14, 2016, there are detrimental health effects from the widespread usage of LED street lighting.

Although more research is needed to understand how much blue light from natural and artificial sources such as sunlight and digital gadgets is “too much blue light” for the retina, many eye care experts are concerned. Blue light exposure from computer screens, smartphones, and other digital gadgets may raise a person’s risk of developing macular degeneration later in life. As a result, guarding your eyes against excessive blue light is a safer habit.

National Anti-Junk Light Day timeline

1801

An Ultraviolet Discovery

Ultraviolet rays are discovered in Germany.

1878

A Use for Blue Lights

The sterilizing effect of blue light is discovered.

1893

Vacuum Ultraviolet

Ultraviolet radiation with wavelengths lower than 200 nanometers (nm) is discovered.

2000s

The Excimer Lamp

These gas-discharge lamps where ultraviolet radiation is generated by spontaneous emission are developed for scientific operations.

National Anti-Junk Light Day FAQs

When is National Anti-Junk Light Day?

National Anti-Junk Light Day 2026 falls on Thursday, September 10, encouraging a mid-week reflection on our daily light habits.

How does junk light impact sleep and eye health?

Exposure to ‘junk light,’ particularly blue light from screens, can disrupt the body’s natural circadian rhythm by suppressing melatonin production, leading to sleep disturbances. It can also cause digital eye strain, characterized by dry eyes, blurred vision, and headaches.

What percentage of adults experience digital eye strain?

A significant majority of adults, estimated at around 60-70%, report experiencing symptoms of digital eye strain due to prolonged use of electronic devices. This widespread issue underscores the relevance of days like National Anti-Junk Light Day.

What are practical steps to reduce junk light exposure?

Practical steps include using blue light filters on screens, taking regular breaks using the 20-20-20 rule (every 20 minutes, look at something 20 feet away for 20 seconds), and ensuring adequate ambient lighting to reduce glare.

How to Observe National Anti-Junk Light Day

Reduce junk light usage

Pledge to reduce your light pollution by turning off unnecessary lights and using lower-wattage bulbs where possible. Avoid using very bright screens in lowly lit rooms and limit the amount of blue light that enters your eye regularly.

Spread useful information

Educate others about the importance of reducing light pollution and how they can do their part to help. Engage in discussions around light and share useful tips on the best light usage practices.

Raise junk light awareness

Advocate for better lighting ordinances and practices at the local level to help reduce light pollution in your community. Explain the long-term effects that excess blue light exposure can have on the eyes as we get older.

5 Illuminating Facts About Lasers Everyone Should See

Lasers can make things cold

While lasers are used to heat up atoms, they can also be used to cool atoms down to incredibly low temperatures.

Light can be used to weigh stars

Scientists discovered that by measuring shifts in the approximate position from the actual position of a star using light waves, it is possible to measure the mass of the star.

Lasers can detect malaria

Because malaria affects red blood cells, and laser beams interact with red blood cells, medical professionals can diagnose malaria infections within 30 minutes with a high degree of accuracy.

Air bubbles turn sound into light

Creating ultrasonic sound waves in a pool of water creates air bubbles that are capable of emitting tiny bursts of light.

Lasers can be made from air

Recent studies have discovered that hitting broken-up air molecules with ultraviolet rays can cause the atoms to give off laser-like light.

Why National Anti-Junk Light Day is Important

It’s an opportunity to educate others

It's a great way to raise awareness about the dangers of junk light. As people absorb light rays into their eyes from different types of screens daily, it’s important to be aware of the amount of light that your eyes need to stay healthy.

It’s a reminder to live healthy

It's a fun way to get people excited about making healthy choices. Learning about the dangers of light pollution can inspire discussions about reducing other kinds of pollution. These lifestyle modifications ensure we enjoy a healthier, longer life.

It encourages people to adopt better lifestyles

It's a great way to show your support for healthy living and inspire others to be more deliberate about lifestyle choices. Reducing pollution also protects the environment from unhealthy toxins which could eventually pose a threat to human life.