Kuris yra geriausias studentų akių apsaugos stalinių lempų gamintojas?
BENWEI Lighting is a manufacturer integrating professional, manufacturing, design and sales one-stop service for the student eye protection table lamp industry. It is the preferred brand in China for the student eye protection table lamp industry. Why choose BENWEI? Because we have a professional team to make professional products, professional services and after-sales service. Moreover, BENWEI can also help you to pay attention to some issues when purchasing student eye protection desk lamps. Let's take a look! The main point of view is whether the student eye protection table lamp is safe? How to judge whether the student eye protection table lamp is safe in terms of electrical performance, etc., it is difficult for ordinary consumers to judge, we can check whether it has passed China's 3C certification . Through 3C certification, the product can be regarded as safe in terms of electrical performance. Is there an electromagnetic radiation hazard in the student's eye protection desk lamp?
Electromagnetic radiation includes two aspects: EMC and EMF. In layman's terms, EMC is concerned with the effects of electromagnetic radiation from equipment to equipment. EMF is concerned with the impact of equipment on people's electromagnetic radiation. Unfortunately, domestic standards do not mandate EMF. So whether EMC and EMF are safe, how do you see it? EMC can check and confirm with 3C certification. Note that products that pass the electromagnetic radiation test in 3C have an SE logo next to the CCC logo. EMF can see whether the product has obtained CE certificate or passed EN/IEC62493 certification. EN62493 is used by the EU to evaluate the impact of electromagnetic fields generated by lighting equipment on the human body. This standard is also one of the necessary tests for obtaining CE certificates. Lighting products entering the EU must pass this test.
Ar mokinio akių apsaugos stalo lempoje yra mėlynos šviesos pavojus?
Due to the light-emitting principle of white LEDs, blue light occupies a relatively high proportion in the LED spectrum (commonly speaking), but whether there is harm, we must analyze it rationally! Don't talk about "blue" color change! Because blue light is one of the components of the sunlight spectrum One, is ubiquitous. So which desk lamp says "no blue light", it must be wrong! The fact that everyone must be clear is: blue light is widespread in desk lamps, and the proportion is more or less. Is it harmful? - How do consumers judge? Look at the product promotion ? Wrong! (Those from tens of yuan to thousands of yuan say there is no blue light hazard) - the correct way is to see whether the product has passed the corresponding photobiological safety test! The European Union, the International Electrotechnical Commission, and China have corresponding standards , only the recommendation of the standard, there is no mandatory implementation of the standard, so there are fewer manufacturers implementing the standard (guessing may be the reason for the cost).
So what are the current standards? (1) EN 62471:2006: Photobiological safety of lamps and luminaire systems (EU) (2) IEC62471:2006: Photobiological safety of lamps and luminaire systems (International Electrotechnical Commission) (3) GB/T 20145-2006: Photobiological safety of lamps and lamp systems (China) The essence of these three standards is the same, and the difference is not big (China's GB should be quoted from the European Union and the Electrotechnical Commission standards) , you can pass one, all pass is better! What is the standard of passing? Say the important thing three times! Reach the exemption level! Reach the exemption level! Reach the exemption level! In addition, these standards also cover purple light hazards, infrared hazards, etc. The test must reach the exemption level! Is there a stroboscopic hazard in the student's eye protection desk lamp?
Personally think that stroboscopic damage to the eyes is the greatest! Why post-90s and post-00s have more myopia than the older generation, I personally think it has something to do with the popularization of fluorescent lamps with serious stroboscopic hazards! Is there any stroboscopic hazard and how to go about it? Judgment? Some will use the mobile phone photography function to illuminate the lights. If there are stripes, it means there is stroboscopic. This is also true. Using this test method to find the stripes, the lights can be passed directly! If there are no stripes, there is no frequency. What about flash hazards? It also depends on whether it has passed the corresponding standard test! The standard is as follows: IEEE PAR 1789-2013: Potential health effects of LED lighting flicker (Institute of Electrical and Electronics Engineers) This standard introduces a "fluctuation depth" to strobe. The concept of stroboscopic, to evaluate the hazard level of stroboscopic! It is not in-depth here! Everyone only needs to know what the standard of passing is! - Reach the non-hazardous level! (You must remember it once! Consider it!)
Studento akių apsaugos stalo lempos spalvos temperatūra turi būti mažesnė nei 4000K šiltos baltos šviesos
The student's eye protection table lamp must be less than 4000K, about 3900! It fits the human rhythm curve! What is the human rhythm, popularly speaking, people have adapted to the law of "sunrise and sunset", the sun is yellow in the morning, and the color temperature is low; at noon The sun is white, and the color temperature is high; in the afternoon, the sun turns yellow, and the color temperature is low! Therefore, it is not recommended to use lamps with high color temperature at night, which does not conform to the above rules, especially for children! (Night workers, please ignore this paragraph!) In addition, high color temperature The blue light content is also high, and the potential blue light hazard risk is high!
