Recently, I studied the essay by Yang Jie and the essay “The Research on the Current Situation of Classroom Lighting in Primary and Secondary Schools in a District of Beijing†(published in Journal of Lighting Engineering, 2016, 06), which is very touching!
1. The current situation of classroom lighting in China is worrying
The author conducted a field survey and questionnaire survey on the current situation of classroom lighting in 20 primary and middle schools in a district and county in Beijing, and concluded the following:
1) The blackboard illumination failure rate is as high as 77.27%, which is very terrible data;
2) The unqualified rate of uniformity of blackboard illumination is as high as 88.64%, and nearly 90% is unqualified;
3) Only one classroom is acceptable for the above 1) and 2);
4) The desk illuminance of the desk is not more than one-third, reaching 36.36%;
5) The unqualified rate of desk table illumination uniformity is as high as 70.46%;
6) All of the above 4) and 5) are qualified and there are 11 classrooms, accounting for 25%.
2, countermeasures
From the above conclusions, it can be seen that there are so many problems in the quality of classroom lighting in primary and secondary schools in Beijing, and schools in remote areas are even more unimaginable. It is concluded that the overall lighting of primary and secondary classrooms in China is worrying. Therefore, there is one in China. The world of brilliance is the first, “China’s youth myopia rate ranks first in the world, and the rate of myopia among college students is over 80%†(from Phoenix Consulting, June 3, 2016). All said that classroom lighting in primary and secondary schools needs to be highly valued by relevant departments and units!
2.1 standard
China's classroom standards are basically synchronized with the international. Now everyone mainly pays attention to the implementation of standards in the design stage. But is the standard strictly enforced throughout the life of the building?
2.2 Concept
The concept has to change. The user (school) pays more attention to the problem that the classroom is not bright. In fact, this is only one aspect and one indicator of classroom lighting. Classroom lighting should be comprehensively evaluated from several indicators: illumination, illumination uniformity, color temperature, color rendering index, glare. If it is an LED light, you should also pay attention to indicators such as R9 and strobe. Therefore, it is not enough to focus only on illuminance!
2.3 Products
In the past, more classrooms used fluorescent lights and were installed perpendicular to the blackboard wall. A dedicated blackboard light is set separately in front of the blackboard. With the maturity of LED technology and the popularity of LED lamp applications, there is a tendency for LED lamps to replace fluorescent lamps. In addition to strip-shaped LED tubes , LED panel lamps are developing rapidly, and their biggest feature is that glare control is superior to traditional fluorescent lamps.
In view of the actual test results, there are big problems in blackboard lighting, which also reminds manufacturers to develop new products as soon as possible to completely solve this problem.
2.4 Maintenance
Maintenance is also an important part of the life cycle. It is often found that replacing the original fluorescent lamp with an LED tube is intended to be good, and the actual effect may have caused a bad thing. Illumination has improved, but glare has increased, and it is more difficult to see the blackboard. Therefore, maintenance should also meet the standards.
3, the conclusion
Primary and secondary school students are in a long-term stage, and the burden of learning is very heavy. If the light environment of the classroom does not meet the requirements, the damage to the students' eyesight is very serious. Lighting standards should be strictly implemented and implemented throughout the design, construction, acceptance, and maintenance processes.
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