I didn't expect that the "King of Radiation" around us is actually this, almost every home has it
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When it comes to radiation, many parents are afraid, especially of home appliance radiation, because children spend a long time indoors and are greatly affected. In daily life, various living appliances, such as mobile phones, microwave ovens, and televisions, will generate electromagnetic radiation.
Today, let us see which one has the greatest radiation and is more likely to cause harm to children?
The state stipulates that the radiation from household appliances cannot exceed 0.4 watts per square meter. So let's take professional testing tools and try them one by one to find out the king of radiation!
Try the refrigerator first , it’s only 0.02 watts per square meter, 20 times lower than the standard! Feel free to use it!
The 0.04 watts from a TV is also safe.
Laptops must be exceeding the standard, right? Nowadays, all white-collar workers are facing computers every day. There are so many anti-radiation tips on the Internet! After measurement, it is only 0.01 ! It is even less than the radiation of TVs and refrigerators? It seems that we have misunderstood computers in the past.
Then the microwave oven must be the problem, right? Everyone knows the principle of microwave oven heating food. But even so, its radiation value is half of the standard, which is safe!
Could it really be a hair dryer ? Fortunately, the radiation value of 0.008 watts per square meter means we don't have to worry.
After searching around and ruling out all the “key suspects”, who could it be?
At this time, the engineer pointed at it - the desk lamp!
The engineer smiled but said nothing, and held the test tool towards the lamp ... 436 watts per square meter! That's 2,000 times higher than the radiation from a microwave oven!
Who would have thought that a small desk lamp would be the king of radiation among home appliances!
The engineer told us that this is because the mainstream desk lamps on the market now have ballasts, and their instantaneous radiation values are very, very high!
However, although the radiation value of the desk lamp is high, it attenuates very quickly. In other words, the farther away from the desk lamp, the lower the radiation value!
If you don’t believe me, just look at this: when you are 10 cm away from the desk lamp, the radiation value is 4.5; when you are 15 cm away, it drops sharply to 0.3, which is completely within the safe range.
So here comes the point: it’s not that desk lamps cannot be used, but they must be used correctly. It is best to keep a distance of 15-20 cm from the desk lamp when reading!
Parents please remember that children must be 15 cm away when using desk lamps!
Choose the right desk lamp for your child
It is also the key to protecting children’s health
Desk lamps are one of the tools that students often use. It is well known that long-term use of inappropriate desk lamps will have adverse effects on the eyesight of children and adolescents . There are many types of desk lamps on the market. Many businesses have labeled their products as "eye protection", "reading and writing only" or "learning only" in their publicity. The prices range from tens of yuan to thousands of yuan. How to choose a suitable desk lamp has become a headache for many parents.
One thing that needs to be made clear is that the "eye protection lamp" advertised by merchants only means that the product itself will not cause harm to the eyes if it meets the relevant quality standards. According to the national definition, this type of product should be called a "reading and writing desk lamp" , and its main function is to provide a more comfortable lighting environment for reading, writing, painting and other operations.
Choose a reading and writing desk lamp
Indicators to watch out for
1. Illuminance: Simply put, it is the brightness of the surface of an object after being illuminated by light. Reading, writing, and studying in dim light for a long time can easily lead to eye fatigue, which not only affects learning efficiency, but may also cause myopia.
2. Illumination uniformity: The uniformity of the irradiated light. In normal reading and writing, children's sight will follow the content of the book. If the illumination is uneven, the eyes will automatically adjust with the intensity of the light, which can easily make children feel tired.
*The parameters of the reading and writing desk lamp will mark the illumination and illumination uniformity as "illumination level". The illumination level is divided into "A" or "AA". The difference is that in the same illumination area, "AA" level illumination and illumination uniformity are higher.
3. Light blocking: In order to avoid direct exposure of the light source to the eyes, the light source is blocked to a certain extent. When the desk lamp is in the normal working position, the user will not see strong light.
4. Color temperature: A measurement of light color. Different color temperatures have different lighting and visual effects. Simply put, the lower the color temperature, the yellower the light color, and the higher the color temperature, the whiter the light color. It can be simply understood as what we usually call yellow light, warm light and white light (super bright) light.
*If you choose a reading or writing desk lamp with non-adjustable brightness, the color temperature should be 4000K; the color temperature range of an adjustable reading or writing desk lamp should include 4000K.
5. Color rendering: the ability of a light source to restore color. Generally, the color rendering index is 0-100. The larger the value, the more realistic the color rendering, the higher the color restoration, and the easier it is for the human eye to distinguish the color of objects. Low color rendering will affect the ability to distinguish and accurately perceive the surrounding space and objects.
*Children's reading and writing desk lamps require a color rendering index of no less than 80. It is best to choose a study desk lamp with a color rendering index greater than 90.
6. Blue light and flicker: Blue light and flicker are common in all kinds of light sources, which can easily cause eye fatigue and even eye diseases or serious health problems such as migraines and headaches. At present, the blue light hazard level is divided into four categories: no hazard, low hazard, medium hazard and high hazard (RG0-RG4).
*Parents must choose products with no blue light (RG0) when choosing reading and writing desk lamps. Products that promote "low blue light" or "blue light reduction" should be chosen with caution!
CCC certification mark
Table lamps are included in the national compulsory product certification catalogue and must pass CCC certification and be affixed with the CCC mark before they can be sold. Currently, for reading and writing table lamps without batteries, only products with the CCC mark can indicate that the product meets electrical, mechanical and other safety requirements and can be used safely.
Parents may wonder why they have never seen many indicators when choosing a reading and writing desk lamp for their children? It doesn't matter, because some indicators may not be printed on the outer packaging of the product, but regular products will have a quality inspection report before leaving the factory for sale, and the relevant content will be displayed.
After understanding these indicators, I believe that parents will have a new understanding of the choice of reading and writing desk lamps for students. So, go and see if the reading and writing desk lamp you choose meets these requirements!
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提升卡
变色卡
千斤顶
The display is really out of control.
Ha ha
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