How does classroom lighting reform protect young people's eyesight health
In recent years, the myopia rate of the majority of elementary and middle school students has remained high and has shown a significant upward trend. The lighting problem in the school classroom is one of the important reasons for the myopia of the elementary and middle school students. According to the requirements in the "Hygienic Standard for Daylighting and Lighting of Classrooms in Primary and Secondary Schools" (GB7793-2010), classroom lighting in primary and secondary schools should meet the following standards. Let's take a look!
1. The desktop illuminance of ordinary classroom classes reaches 300lx, the uniformity of illuminance is ≥0.7, and the uniform glare ≤19.
2. Blackboard illuminance reaches 500lx, illuminance uniformity ≥ 0.8.
3. The color rendering index of ordinary classrooms is ≥80, and the color temperature is 3300-5500k. It is not suitable to use naked lighting.
Among the above three points, one and two are mandatory standards, and the third is recommended standards. At present, most classrooms in primary and middle schools use fluorescent tubes or ordinary LED tubes as lighting fixtures. These lamps generally have the following problems:
One is that the illuminance and uniformity of illuminance are not up to standard. At present, the illuminance, uniformity of illuminance and CRI of many classrooms are not up to national standards, and even quite a few classrooms do not have blackboard lights. Students studying in a low-illuminance environment for a long time can easily cause eye fatigue and cone-shaped eyes. Cell sensitivity will also decrease, which will cause various vision problems over time.
Second, the glare is very serious. The national standard stipulates that the glare value of classroom lights is <19, and most classroom lamps use simple fluorescent lamp brackets, the light source is directly exposed, the light is very dazzling, and the light glare value exceeds 22, which makes the eye muscles excessively tense and seriously affects the concentration of students in class.
The third is the light strobe. Generally, fluorescent lamps use AC power, and the current periodically changes with time to make the light brightness unstable. When learning under stroboscopic light source, the visual system needs to constantly adjust the size of the eye pupil to protect the stability of the retinal light intensity and imaging clarity. , Studying in this light environment for a long time will definitely make the pupil sphincter tired due to overuse.
Fourth is the low color rendering index of the light source. The incomplete spectrum of ordinary fluorescent lamps will cause color loss and color cast, which is far from reaching the national standard Ra≥80. And because of the poor color reproduction ability of lighting fixtures, it will directly affect students' color discrimination ability.
Fifth, the color temperature is on the high side. The national standard stipulates that the color temperature of classroom lighting fixtures is 3300-5500K, and the actual measurement results of most classroom lighting fixtures have reached 6500K. If the color temperature is too high, the proportion of blue radiation increases, and the blue light also increases. If blue light increases, it will cause macular degeneration and other problems.
Sixth, the life of the light source is low. Ordinary fluorescent tubes will have light attenuation after half a year of use, resulting in a decrease in luminous flux, thus failing to meet the standard requirements of classroom lighting and lighting hygiene.
These problems can easily induce myopia in students, and directly affect students' vision health and learning efficiency. Suggestions for this:
1. Formulate a unified classroom lighting manufacturing standard across the province. The education, health, and market supervision departments of our province shall, on the basis of extensive investigation and full demonstration, strictly follow the requirements of "Classroom Daylighting and Lighting Hygiene Standards for Primary and Secondary Schools" and combine the actual conditions of primary and secondary schools in our province to jointly develop classroom lighting. Lighting manufacturing standards.
2. Implement a licensing system for classroom lighting manufacturers. Classroom lighting is related to the eyesight health of primary and middle school students. Strict regulations must be made on the qualifications of related manufacturing enterprises, and production licenses must be issued to enterprises that meet the production qualifications. Implement unified bidding, unified procurement, and unified supervision of products produced by licensed enterprises to ensure that the lighting fixtures installed in the classrooms meet relevant standards.
3. The school shall regularly test the lighting fixtures in the classroom. The provincial education authority shall issue relevant documents to instruct schools to regularly inspect classroom lighting fixtures and clarify the light attenuation standards for replacement lamps.
4. Increase financial support for the procurement of classroom lighting. Local governments should increase investment in the procurement of classroom lighting fixtures to ensure that new classroom lighting fixtures meet relevant standards and gradually replace the original lighting fixtures that do not meet the standards. In addition, because lighting problems are an important factor affecting the visual health of young people, in addition to further improving the lighting and lighting hygiene standards in school classrooms, we should also actively promote the introduction of lighting and lighting hygiene recommendations for the prevention of young people’s myopia in homes and public places. We will work together to protect the health of young people’s eyesight.
