After the child goes to primary school, the homework begins to increase, and the time spent on the eyes is getting longer and longer, if the light source at home is not good, it is likely to cause the child to develop myopia prematurely, so it is indeed very important to choose a suitable desk lamp.
As a parent, I am also very concerned about my child's vision problems and have spent up to a week researching the eye-care desk lamp.
Here are some of the key points I have compiled on how to choose and buy a desk lamp, I hope it can help you.
1. What kind of table lamp is considered an eye-protecting table lamp?
Strictly speaking, "eye protection desk lamp" is not a rigorous concept, and its scientific name is "reading and writing desk lamp".
Therefore, when we buy a table lamp, don't just look at its promotional slogan, the table lamp that claims to protect the eyes may not really protect the eyes, only those table lamps that meet the relevant performance requirements are eye protection.
For the desk lamp for reading and writing work, it needs to meet the GB/T 9473-2022 "Performance Requirements for Reading and Writing Work Desk Lamp", this standard can be searched on the Internet, and this standard has been officially implemented on January 1, 2024, so it must prevail now.
And with the standard, the idea of choosing a table lamp is clear.
Second, the parameters to pay attention to when choosing a table lamp
1. Color rendering index
The color rendering index can be simply understood as the ability of the light source to restore the original color of the object, and the larger the color rendering index, the more restored it represents (the maximum value is 100).
If the color rendering index of the desk lamp is too low, the object will not be able to show its true color, affecting the child's eyes to recognize the color of the object, and in the long run, the child will have vision problems such as color blindness and color weakness and eye diseases.
Among them, Ra stands for the general color rendering index, and the standard stipulates that Ra must be greater than 80;
R9 represents the color rendering index of saturated red. The standard states that R9 cannot be less than 0.
When you buy a table lamp, you must pay attention to these two values.
(Attentive friends will find that some eye-protecting table lamps are not marked with R9, because although they meet the standard, the data is too small to look good, so they simply do not mark it; Lamps with a high R9 value will mark it as a selling point.)
2. Illuminance and illumination uniformity
Illuminance, that is, the intensity of light, it determines how much the table lamp can illuminate the desktop, in the case of the environment and other factors remain unchanged, the greater the illuminance value, the brighter our desk lamp. Within a certain range, the higher the illumination of the table lamp, the better. (cannot be higher than 2500lx)
The illumination uniformity refers to the maximum value of the light intensity within a certain lighting range, compared with the minimum value, the closer the result is to 1, indicating that the light of the desk lamp is more uniform. And the more even the light, the more comfortable it is for your eyes.
The standard stipulates that according to these two parameters, the light level of the eye protection table can be divided into A level and AA level.
The so-called total area refers to a rectangle of 700mm*500mm; The central area refers to a rectangle of 500mm*300mm (the corners of the rectangle are rounded).
When looking at the parameters of the desk lamp for reading and writing jobs, we have to see whether it reaches a level of A or above, and AA level is better than A level, but there is no AAA level, which must be noted. AAA level is our own standard for a small testing institution in Shenzhen. Not authoritative. This is the key point, and it needs to be examined.
3. Strobe
Strobe is the flickering of a screen or light source, measured in Hz (hertz), and strobe can cause vision loss. Strobe cannot be eliminated absolutely, but it can be increased by increasing the frequency so that the naked eye cannot perceive it, so that the harm is eliminated.
For a desk lamp, as long as the strobe is higher than 3125Hz, we can't perceive it.
4. Blu-ray
As we all know, blue light can damage the retina, so nowadays all kinds of lamps and devices with screens emphasize that they have low or no blue light.
For the reading and writing desk lamp, the standard stipulates that its blue light hazard category should be RG0, and now most of the eye-protecting desk lamps can meet this requirement, so there is no need to worry too much about this.
5. Color temperature
For lights, the lower the color temperature, the warmer the light color, and vice versa, the higher the color of the light.
The color temperature of 4000K is the most natural, and combined with the knowledge of blue light hurting the eyes, it can be seen that a table lamp slightly lower than 4000K can meet the requirements of eye protection.
According to the standard, if a reading and writing desk lamp can adjust the color temperature, then it must be able to be adjusted to less than 4000K; If it can't be adjusted, it should be fixed below 4000k.
3. Recommendations for eye protection desk lamps.
If you have time, you can take a look at BenQ MindDuo Eye Protection Desk Lamp, Manshuyu K1 Eye Protection Desk Lamp, and LiPro Eye Protection Desk Lamp. The various data of the product are considered to be outstanding. And the brand power is also very good.
Lipro Eye Care Table Lamp ¥1874 Buy
I believe that seeing this, everyone can also understand that in fact, the most important thing to buy a table lamp is to check its parameters in combination with relevant standards, and to avoid stepping on the pit if you understand the parameters.