When many consumers choose eye-friendly table lamps, they often see merchants advertise their products as "AAA certified" and "meet AAA requirements" and so on. At the same time, there is also an AA standard in the eye protection table lamp industry, which is often taken out by businesses. For many consumers, without understanding the specific technical principles of eye protection desk lamps, they will subconsciously choose according to the "level", thinking that AAA is better than AA. In fact, this choice is wrong, because AA and AAA are not the same thing at all, so they cannot be compared.
1. Sources of AA and AAA grades
The AA level comes from the "GB/T9473-2022 Performance Requirements for Desk Lamps for Reading and Writing Operations". There will be national standards for products in any industry, and the field of eye protection table lamps is no exception. At present, the national standard that can be referred to in the field of eye-protection desk lamps is the "GB/T9473-2022 Performance Requirements for Reading and Writing Desk Lamps", which specifically stipulates the luminosity level of eye-protecting desk lamps. The details are shown in the figure below.
The meaning of this diagram is that the luminosity of the reading and writing desk lamp should meet the requirements in the diagram within the corresponding gear and range. From the table, it can be seen that there are two photometric levels involved in the "Requirements", which are AA and A. That's where the AA grade comes in.
In the final analysis, AA level is the requirement for product luminosity in the "GB/T9473-2022 Performance Requirements for Reading and Writing Desk Lamps". If the AA level is used to measure the quality of the product, we can only examine the illumination and illumination uniformity of the table lamp at most, and cannot be examined for color temperature, blue light protection, strobe protection, etc.
AAA level is a certification from SMQ (Shenzhen Institute of Metrology and Quality Inspection). CIE evaluates and certifies the lighting health quality of table lamp products based on natural light, and AAA certification will be issued to those who pass. From the point of view of the source, there are many technical indicators that need to be involved in AAA level, such as spectrum, illuminance, illuminance uniformity, blue light, strobe, color rendering index, color tolerance, and noise, which will affect the evaluation. The specific evaluation process is as follows: the total score of each indicator exceeds 90 to be certified as AAA.
If a product has achieved AAA certification, is it trustworthy? The answer is no. From the point of view of the scoring method, if the Blu-ray score of a product is 70, and the others are full scores, then the total will exceed 90 points. At this time, the blue light protection level of the desk lamp product is very low, and long-term use will cause great damage to the user's eyes.
Therefore, when we buy an eye-protecting table lamp, we can't just look at the level, nor can we see AAA and make a brainless choice. On the contrary, consumers should pay attention to whether the technical parameters meet the provisions of the "GB/T9473-2022 Performance Requirements for Reading and Writing Desk Lamps" when choosing products. Let's talk about it in detail.
Second, how to choose an eye-protecting table lamp?
The "GB/T9473-2022 Performance Requirements for Desk Lamps for Reading and Writing Operations" clearly stipulates the illumination level, blue light protection level, strobe protection, color rendering level, color temperature, etc. of the eye-protecting desk lamp.
As shown in the figure above, the "Requirements" stipulates that in the 300mm*500mm rectangular area, the minimum horizontal illumination should be ≧ 500lx, the maximum should not exceed 2500lx, and the illumination uniformity should be ≦ 3, close to 1 is the best.
The color rendering level of the reading and writing desk lamp should meet the detailed requirements, that is, the general color rendering index Ra should be greater than 80, and the special color rendering index R9 should be greater than 0; Of course, in practice, I recommend choosing eye protection table lamp products according to the requirements of Ra>90, R9>90.
It is suggested in the "Requirements" that reading and writing activities are best carried out at a color temperature of 4000K, so when selecting products, we should choose products with a constant color temperature of 4000K. As for whether to buy a product with adjustable color temperature, you should consider it according to your own needs, but even if you choose a product with adjustable color temperature, you should adjust the color temperature to 4000K in reading and writing activities.
The "Requirements" stipulate that the blue light hazard of the reading and writing desk lamp should reach the level of RG0, that is, there is no blue light hazard. At present, some products use violet excitation technology to replace traditional blue light excitation. This new technology can eliminate the generation of harmful blue light at the root and achieve better blue light protection. Therefore, consumers can give preference to products with purple excitation technology when purchasing products.
Strobe is also one of the common hazards of LED lighting fixtures. The "Requirements" stipulate that the light output frequency of the reading and writing desk lamp should be above 3125HZ. When purchasing, consumers should pay attention to whether the product is free of video flash hazards or whether the light output frequency is greater than 3125HZ.
Of course, removing the provisions in the "Requirements", some table lamps that adopt new technology are also worth buying. For example, some table lamps use red light technology. Beneficial red light can increase mitochondrial activity in the eye and relieve visual fatigue.
According to the selection criteria listed above, you may wish to pay more attention to the following products when purchasing.
Babyview OP36
The technical content of this product is high, and the technical parameters are better than the national standard. For example, the illuminance uniformity is 1.68, which is very close to "1". It is precisely because of the high level of technology that this product is able to provide users with better quality lighting.
Comic Book Rain K1
The white light part of Manshuyu k1 uses LED lamp beads excited by purple light, which can eliminate the harm of blue light from the root; In addition to the outstanding performance in the technical indicators required by the state, K1 also adopts red light and eye benefit technology, which can effectively relieve eye fatigue and prevent the development of myopia through the stimulation of eye cells by beneficial red light.
Panasonic Zhizhun 3G
This table lamp adopts a rectangular wide lamp head, which has a large light area, a more comfortable soft light, an expanded lens to reduce reading and writing ghosting, and an intelligent control for automatic dimming to improve the convenience of operation.