Protect students' eye health should pay attention to classroom lighting
At the beginning of the new semester, many parents and students are busy preparing for the college entrance examination. The reporter learned from the Beijing Municipal Health Planning Commission that the medical examination time for the Beijing college entrance examination this year is from March 1 to March 20. The reporter also learned that in recent high school entrance examinations, the lack of vision is very common and has become a major health problem for adolescents.
At the end of October last year, the Ministry of Education, the National Health and Family Planning Commission, and the General Office of the State Sports General Administration jointly issued the "Guiding Opinions on Strengthening the Prevention and Control of Children and Adolescents' Myopia", aiming at effectively controlling the incidence of myopia in children and adolescents in China and improving the visual health of children and adolescents. Level. The document pointed out that all primary and secondary schools should ensure that classroom lighting and lighting meet the relevant national documents and standards, and provide students with a learning environment that meets eye hygiene requirements.
So, what kind of learning environment can meet the eye requirements? During the visit, the reporter learned that many teachers and students are not particularly satisfied with the current classroom lighting environment, but the reporter also found an "interesting phenomenon" - the school teachers and students using LED (light-emitting diode) lamps generally reflect the good lighting environment. Classroom lighting with LED is not suitable for students. With this question, we interviewed the Deputy Director of the National Electric Light Source Quality Supervision and Inspection Center (Shanghai), the Visiting Professor of the Institute of Electric Light Sources of Fudan University, and the Chairman of the Shanghai Lighting Society, Yu Anqi.
Reporter: At present, LED is widely used in home, commercial, public lighting and other fields. In the field of classroom lighting, fluorescent lamps are mostly used. Is fluorescent light more suitable for students and more advantageous?
Anqi Yu : Actually, 6 years ago, I did not support the application of LED lighting products in classroom lighting, because the technical level of LED lighting products was far from the level of traditional fluorescent lamps. In recent years, LED lighting technology has advanced by leaps and bounds. High-quality LED lamps and light sources have surpassed traditional light sources in terms of light efficiency, color temperature, color rendering index, light distribution, light decay and reliability.
At present, the fluorescent lamps used in most classrooms have no problem of circumvention. The light fading is serious, and the illumination and illumination uniformity of the desks are generally lower than the national standards. The direct light of students' eyes produces glare, and the configured magnetic ballasts are serious. Light strobe, it is bound to cause visual fatigue leading to myopia. Fluorescent lamps contain mercury, and their environmental pollution is immeasurable and will be phased out in the future.
In addition, the three characteristics of LED energy saving, long life and extremely low maintenance cost are also unmatched by fluorescent lamps. Therefore, the field of classroom lighting should promptly introduce a new generation of high-quality LED products with high efficiency, eye protection, energy saving and environmental protection, which is very important for the protection of students' vision.
Reporter: At present, there are some parents or organizations who have certain concerns and concerns about the so-called "blue light hazard" of LED lighting products. How do you view this problem?
Anqi Yu : First of all, it should be clear that blue light is an important part of visible light. Whether it is natural seven-color light or synthetic three-color light, there is no white light without blue light. In general, LED lighting products do not produce more blue light than other types of lighting products at the same color temperature.
Regarding the blue light hazard of LED lighting products, the standards issued jointly by the General Administration of Quality Supervision, Inspection and Quarantine and the China National Standardization Administration have already had a very clear basis for judgment. As long as the LED lighting products that meet RG0 or RG1 can be used with confidence. Instead of "excessively" interpreting LED blue light hazards, it is better to pay more attention to the problems of fluorescent lights.