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The French health authorities, who say that LED lights are permanently harmful to eyes, are recommending which lights to choose

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The French health authorities, who say that LED lights are permanently harmful to eyes, are recommending which lights to choose

  • Categories:Industry News
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  • Time of issue:2020-11-13 10:31
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(Summary description)French health authorities say LEDs cause permanent damage to the retina.This sounds really scary, so many students came to consult. So let’s take a look today, what the French health authority, ANSES said in the report.

The French health authorities, who say that LED lights are permanently harmful to eyes, are recommending which lights to choose

(Summary description)French health authorities say LEDs cause permanent damage to the retina.This sounds really scary, so many students came to consult. So let’s take a look today, what the French health authority, ANSES said in the report.

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2020-11-13 10:31
  • Views:
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There is such a piece of news that many parents who are concerned about vision problems begin to struggle, and that is the news that "French health authorities say LEDs cause permanent damage to the retina".

This sounds really scary, so many students came to consult. So let’s take a look today, what the French health authority, ANSES said in the report.


The full name of ANSES is: "Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail", which translates to the National Food Safety, Environment and Labor Administration. On May 14, the official website of ANSES issued this press release on LED research.

Because of the advantages of environmental protection, more and more countries have banned products with high energy consumption such as incandescent bulbs, and LED has become the world's most important artificial light source. But for any new product, we need to maintain a cautious attitude, constantly study what risks it may have, and set safer standards. This is a scientific approach to technological progress, and it also makes our era a case of longevity and health in human history.

For the potential risks that may exist in LED light sources, relevant research institutions in various countries are constantly researching and digging. French ANSES will also regularly analyze and summarize the global research on the risks of LEDs, give suggestions on the use of LEDs by the French people, and regulate and require LED products sold in France.

This time the news is that ANSES has updated its risk assessment of LED light sources (the last time was in 2010) and summarized relevant research for about 10 years. So what does this report say? Is LED really that terrible?


The main reason for LED concerns is the blue light. Different lights have different light spectrums because of their different light-emitting principles. We tested and read "Eye-protection Lights" a year ago. In that article, we used to compare the light spectrums of different lights: Compared with traditional incandescent lights, the ratio of blue light of LEDs is higher. High, this is what everyone is worried about, and it is also the focus of ANSES's report.

The official name of blue light is high-energy visible light, because of all visible light, blue-violet light has the highest energy, so this part is the part of visible light that is most worried about whether it may affect the human body. The reason for focusing on visible light is that in addition to visible light, sunlight also has ultraviolet and infrared rays. Ultraviolet rays have higher energy and have a clear risk of harm to the body. This is why we must pay attention to sun protection and wear sunglasses in summer.

And we always see people around us who never care about sun protection and feel that wearing sunglasses is unnecessary, but the people who are scared to death when they hear the blue light are the documentation of the idiom "put the cart before the horse".

Blue light is a natural existence in sunlight, so our life cannot really "isolate blue light", otherwise we will not see white. We tested the spectrum of sunlight (left) with LED lights (middle) and mobile phone screens (right). It is obvious that compared with LEDs and mobile phone screens, the proportion of high-energy blue-violet light with a wavelength of less than 430nm in sunlight is higher.

Therefore, the point is not to isolate the blue light, but to isolate the blue light risk caused by unreasonable use of lights or unqualified lights. This mainly comes from two aspects:

1. The risk of damage to the retina of high-intensity blue light exceeding the allowable value;

2. The effect of long-term exposure to blue light at night on the biological clock.

This is also the core content of the French ANSES report.


Because the report is in French, we have translated several core content in the press release on the ANSES official website:

ANSES believes that the risks of LED blue light are:

Short-term strong blue light or long-term blue light exposure may cause damage to the eyes, cause vision loss, and increase the risk of age-related macular degeneration in old age.

Exposure to strong blue light at night can disturb the biological clock and affect sleep. ANSES reminds you to pay attention to this problem when using computers, mobile phones or tablets at night.

Some LED lights have large changes in light intensity and uneven illumination, which can cause discomfort for certain sensitive groups, such as headaches and visual fatigue for children and adolescents.

But not all LED lights will cause damage to the eyes. In the ANSES report, the risks of different LED light sources are clearly treated differently.

For example, for our commonly used LED reading lights, ANSES says this:

"Les éclairages domestiques à LED de type «blanc chaud» ne se distinguent pas des éclairages traditionnels et présentent un faible risque de phototoxicité.

The light of "warm white" LED home lights is no different from traditional lighting, and the risk of light damage is low. "

ANSES did pay special attention to LED lights this time, but it's not that many people started to worry about home lights or reading lights after seeing the news, because most of these products meet safety certification. ANSES proposed that the LED lighting that needs to be focused on is actually:

“En revanche, d'autres types d'éclairage à LED tels que des lampes torches, des phares automobiles, des décorations ou des jouets, peuvent émettre des lumières particulièrement riches en bleu et appartenir au groupe de risque 2, mais ils ne sont pa couverts par la réglementation actuelle.

On the other hand, LED lights such as flashlights, car headlights, building decoration lights, and toys can emit light with a higher blue content and belong to the second risk group, but they are not currently covered by the current (EU) regulations. "

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