As children get older, the schoolwork is heavy. Vision is gradually becoming the most important concern for our parents. If you don't do a good job of monitoring it during the habit formation period, it will be difficult to correct it in the future.
My child has been using the ceiling lamp in the room to study, and there will be uneven lighting and too low brightness. Worried about his eyesight problems, I decided to buy him an eye-friendly table lamp.
But how to choose, what brand to choose, has become a new problem for me.
So I flipped through the "Four Books and Five Classics" and tried to find the most cost-effective table lamp for my treasure.
Here's what I've done recently.
I will share it with you today for free.
I hope my answer helps you.
1. How to choose an eye-protecting table lamp?
All of the following parameters are from:
[GB/T 9473-2022 Performance requirements for desk lamps for reading and writing operations]
This is the latest update of Continental's parameter standard for the performance requirements of eye-protecting table lamps.
(hereinafter collectively referred to as "Standards").
1. Illumination and illumination uniformity
Let's briefly explain what it means.
"Illuminance" is how well an object is illuminated.
At the same color temperature and at the same illuminance level.
This lamp illuminates the entire page.
The other lamp can only illuminate 1/3 of the page.
Which table lamp do you say works well?
But it's not enough to just have high illumination, it has to be even.
This leads to the term "illuminance uniformity".
There is also a formula here: maximum illuminance / minimum illuminance = illuminance uniformity.
The closer this value is to 1, the more uniform it is.
In addition to the above two parameters, it is also necessary to pay attention to the issue of rank.
AA grade is preferred.
But now the table lamps on the market are high in price, and the low price can basically do AA.
So you don't have to worry too much about that.
The following data is an example of what should be met.
2. Color rendering
"Rendering" literally means displaying color.
What it actually means: the degree to which the object is restored under the light source.
Lighting is usually used as a reference criterion with a color rendering of 100.
According to the standard:
In general, the color rendering index Ra should not be lower than 80.
For table lamps with LED light source, the color rendering index R9 should be greater than 0.
Now the table lamp Ra on the market can basically achieve more than 80 or even close to 100.
And R9 is not displayed by all merchants.
At the end of the day, the data isn't pretty enough.
But businesses that do it will put the data on the detail page.
So you need to pay extra attention when choosing.
3. No blue light and no flicker
Everyone knows this about Blu-ray.
Blue light in a specific band can cause irreversible harm to the human eye.
According to the requirements, RG0 is the safety level.
So about Blu-ray to look at this indicator.
A strobe is a rapid and repetitive change in light intensity from a light source.
It's like in the movie, when a storm comes, and the ceiling lights flicker quickly and repeatedly.
It gives people a sense of tension and excitement, as if something big is happening.
Someone asked, how can the eye-protecting table lamp come to this point.
Of course, it certainly won't come to this.
I'm just using an analogy. If it really comes to this.
I really suspect that the quality inspection department collects money.
And when I wear an eye-protecting stand.
Subtle strobes cannot be seen with the human eye alone.
So even if this lamp has a flicker problem, it won't be easy to notice.
But this kind of strobe can cause certain harm to people.
For example, overworked eyes, migraines, nausea and other problems.
There is a simple tip that does not cost money, and everyone can test at home.
Turn on the camera function of your phone and point it at the light source to record a video.
If you notice a strobe.
OK, this is not a good eye-protecting table lamp.
We should also pay more attention to these two elements when choosing.
2. Do you have any good brand recommendations?
Finally, I would like to share with you two good eye protection table lamp brands.
First of all, Huawei chooses Opple Smart Desk Lamp Pro.
This table lamp has reached the national AA illuminance level standard.
The color rendering index Ra>95.
Like the Ra>80 mentioned above, it is the standard.
But it's 95 years old.
RG0 is free of blue light hazards and strengthens the protection of both eyes.
No flicker, low noise.
The price of this table lamp is around 300 yuan.
Good value for money, it's still worth buying.
Secondly, Babyview VL225 eye protection table lamp.
High color rendering Ra98.3, better than most eye-protecting table lamps.
RG0 level has no blue light, no flicker, no radiation damage.
4000k natural light color. Plug-in and off-power universal.
78 lamp beads diffuse and glow evenly. The diffuse effect is more uniform and soft.
Smart break reminders. Ensure the scientific use of eyes, the combination of work and rest.
Overall, it's well worth buying.
To sum up, it is the elements that need to be paid attention to when buying a table lamp~
You can pay more attention when choosing!