Now students' eyesight problems are getting more and more serious. This problem cannot be ignored. Many schools will choose special lamps for school classrooms in order to improve them, but the main factor is that the design of school classroom lamps is not very scientific and reasonable, which is unhealthy. What are the common problems with school classroom lighting?
1. Many lighting fixtures use fluorescent lamps with a high LED color temperature (6500K) that are cooler in light color. The light source is too pale and stiff, which can easily lead to visual fatigue.
2. Most of the lighting fixtures use soft hangers, and the electric fan is installed on the top of the lighting fixture. When the electric fan is started together with the lighting, there are generally serious lamp swings and lighting shaking.
3. There are no special blackboard lights, or the installation of blackboard lights is not standardized. For example, ordinary simple fluorescent lights are used as blackboard lights. Not only the school classroom blackboard has low illumination and low visibility, but students are watching the school classroom blackboard. When the lamp is damaged, the direct glare of the lamp can be seen, which can easily lead to visual fatigue.
4. Many special-purpose lamps in classrooms in schools use simple fluorescent lamps with low quality, low price, high energy consumption, and the technical level remains at the level of the 1980s and 1990s.
5. Many school classrooms use magnetic ballasts for special lamps, and there is a relatively serious stroboscopic situation.
Based on the above analysis, we can see that there are some problems with special lamps in school classrooms. In fact, with the continuous improvement of the technical level of society, the defects of traditional special lamps have been fully improved. The eye protection panel light does not generally have the above problems, and as long as the design scheme is scientific and reasonable in the process of use, it will not cause the students' visual fatigue, so it can reasonably and effectively reduce the students' myopia. Happening.
The State Administration for Market Regulation and the Standardization Administration of my country have approved and issued the Sanitary Requirements for Lighting Design and Installation of Classroom Lighting in Primary and Secondary Schools (GB/T36876-2018). The surface illuminance and the sanitary requirements for the installation of the design plan are clearly stipulated in detail:
1. Suspended eye protection panel lamps should be used, and the efficiency of eye protection panel lamps should not be less than 60%.
2. The unified light value (UGR) of the eye protection panel light cannot exceed 19.
3. The LED color temperature should be 3300K ~ 5500K, and the color rendering index should not be less than 80.
4. The average illuminance of the desktop in the school classroom is not less than 300lx, and the illuminance uniformity is not less than 0.7; the average illuminance of the blackboard surface of the school classroom is not less than 500lx, and the illuminance uniformity is not less than 0.8.
5. The eye protection panel lights should be installed by hanging rods, and should be evenly arranged in the vertical direction of the school classroom (the long axis of the lighting lamps is perpendicular to the blackboard of the school classroom). The power density of the eye protection panel lights in the school classroom should not be higher than 11W/㎡. The condition of the area should be less than 9W/㎡. The vertical distance (g) between the lighting fixture and the desk is not less than 1700mm.
6. When calculating illuminance in lighting design, its maintenance factor should be selected as 0.8.
