It was another quiet night, I sorted out my child’s heavy school bag, looked at the small figure under the light, still writing hard, and at the same time worried, I thought that the “little glasses” in the class gradually increased. It’s time to pick a really reliable eye protection lamp for your child. However, before buying, you can also refer to the evaluation of 10 eye protection lamps brought by the Shenzhen Consumer Council, don’t let the heavy glasses accompany your child’s life.
The price is similar, which of these brands is better or worse?
The rabbit master evaluation covers a total of 10 kinds of eye protection lamps this time, including Midea Lighting, OPPLE Lighting, Panasonic, Xiaomi Ecological Chain Yeelight, NVC Lighting, Dr. Edward, Children’s Vision, Good Vision, NetEase Strict Selection, both national and imported products.
What kind of eye protection lamp is called “good”? Master Rabbit learned that correlation color temperature, color rendering index, blue light damage, strobe visibility and short-term flicker index, illuminance and illumination uniformity are the most important six indicators. Only soft, less flickering, uniform eye protection lamps can really protect eyesight. In this evaluation, Master Rabbit will start from these six indicators and compare the quality of different brands of desk lamps.
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Round 1 Correlated Color Temperature: All brands pass the test
For a desk lamp, the higher the correlated color temperature means that the lighter and more dazzling the light it emits, the lower the light, the more yellow and dim, and a good eye protection lamp should meet the national standard GB/T9473-2017 “reading and writing desk lamp performance requirements”, the color temperature is kept at about 4000K (3985±275K), the light is soft and slightly yellow, which will not affect the clarity, and can also avoid children’s eyes from being repeatedly stimulated by strong light.
After testing, the relevant color temperature of 10 table lamps is within the standard (2710~4260K), which meets the national standard, which means that they can be used with confidence without worrying about obvious damage to the child’s vision due to color temperature.
Round 2 color rendering index: Xiaomi ecological chain Yeelight, Childview, NVC lighting came out on top
What is Color Rendering Index? This is a number that shows whether the original color can be restored under lighting. The higher the number, the more distinct the object will be seen under the light of this lamp, if the value is too low, it means that the object will appear gray, which is not only easy to cause illusions, but also affect vision for a long time.
After testing, the color rendering index of 5 products exceeded 90, and the color rendering index of the three brands of Xiaomi ecological chain Yeelight, Childview and NVC Lighting reached more than 97, and the R9 index was 98, 98 and 93 respectively, which can basically restore the color primary color, and the performance is particularly outstanding. Choose these three types of eye protection lamps, with less color difference, so that children can enjoy the real colors under natural light when reading indoors.
Round 3 Blue Light Damage: None of the 10 products have blue light damage
What is Blu-ray? Why does it hurt? It turns out that blue light here refers to high-energy visible light with wavelengths between 400 and 500 nanometers. It can penetrate the lens to reach the retina, causing optical damage to the child’s retina and accelerating the oxidation of macular cells. What’s even more frightening is that the damage caused by blue light will accumulate! Long-term under blue light, the impact on vision will be increasing!
Fortunately, after testing, the 10 products selected this time have reached the RG0 level in the standard, which means that they will not produce blue light harm, it seems that the advertisement of no blue light damage is still very reliable!
Round 4 Strobe and Short-Term Flicker Index: Midea lighting performs best
What are the dangers of strobes? Under the light, if the light flashes, adults will be “shaken” dizzy for a long time, let alone children. Flashing illumination can lead to debilitating signs of vision such as eye strain, tiredness, blurred vision, as well as traditional headaches and reduced ability to perform vision-related effects.
To measure strobe, we generally use the short-term flicker index (Pst), which is the smaller the value of the strobe effect visualization parameter (SVM), the better. The lower the value, it means that the light of the eye protection lamp flashes less often and is less likely to cause damage to the child’s eyes. According to the standard NEMA 77-2017, the short-term flicker index (Pst) needs to be less than 1, and the strobe effect visualization parameter (SVM) needs to be less than 1.6.
After testing, it is gratifying that all 10 products can meet the requirements of the EPA Energy Star for the strobe performance of dimmable lamps, and the two index parameters of PST and SVM are much smaller than the limits 1 and 1.6. However, Midea’s lighting performance is particularly excellent, and its two indicators are close to 0, which can be said to minimize the harm of flicker. In addition, the index of the four brands of Xiaomi ecological chain Yeelight, OPPLE Lighting, Philips Lighting, and ChildrenVision is also at a low level.
Round 5 illuminance and illumination uniformity: Childview, NVC and Xiaomi ecological chain Yeelight reached national AA level
What should be the illumination of good eye protection, etc.? The illumination is too low, the light is dim, the child must squint to see the words on the book, and long-term eye fatigue can easily cause myopia. The illumination is too high, the light is strong, and it is easy to reflect into the eyes through the white paper, causing irritating damage. To this end, the 6.34 requirements of the national standard GB/T9473-2017 “Performance Requirements for Reading and Writing Desk Lamps” deliberately classify reading and writing desk lamps according to the degree of grade A and AA (see the figure below).
After testing, among the 10 eye-protection lamps, three products, Childview, NVC and Xiaomi Eco-Chain Yeelight, performed the best, and all of them met the AA requirements; The two products carefully selected by Good Vision and NetEase did not meet the requirements of Grade A (Good Vision did not claim that its products could meet the Grade A requirements); The remaining five products can meet the requirements of Grade A.
After reading the rabbit master evaluation, I must have some more confident ideas about the purchase of eye protection lamps. In fact, eye protection lamps are only one of the measures to protect the eyes, the combination of work and rest, good reading posture and habits, multi-pronged can make the child’s future brighter.
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(Mini programs have been added here, please go to Toutiao client to view)
(Mini programs have been added here, please go to Toutiao client to view)