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Reforming the poor classroom lighting environment is an effective measure to prevent the decline of students' eyesight

Reforming the poor classroom lighting environment is an effective measure to prevent the decline of students' eyesight

2021-10-18

Since 2016, the country has focused the theme of "eye love day" on the prevention and treatment of low vision of children and adolescents for five consecutive years. The main reason is that the incidence rate of myopia in children and adolescents has been increasing in recent years and has been developing to younger age. The survey results show that the myopia rate of children and adolescents in 2018 is 53.6%. Including 14.5% of 6-year-old children, 36.0% of primary school students, 71.6% of junior middle school students and 81.0% of senior high school students.

Prevention and treatment of myopia is a major problem related to the healthy growth of young students. There are many causes of myopia, mainly two kinds: genetic factors and non genetic factors. In addition, among the non genetic factors, such as improper sitting posture, heavy learning burden, watching TV, computers, mobile phones and other electronic equipment for too long, but according to the survey of the National Center for Disease Control and prevention, the poor classroom lighting environment is one of the main reasons for the decline of students' vision.

The State Administration of market supervision and the State Standardization Administration approved and issued the hygienic requirements for lighting design and installation of ordinary classrooms in primary and secondary schools (GB / t36876-2018). In this new standard, the specific parameters of classroom lighting lamps, the overall illuminance of classrooms and the hygienic requirements for design and installation of primary and secondary schools are specified in detail:

1. Suspended grid lamps should be used, and the efficiency of lamps should not be less than 60%.

2. The uniform light value (UGR) of lamps shall not be greater than 19, and the calculation method of uniform glare value (UGR) shall be implemented according to cie117.

3. The color temperature of lamps shall be 3300K ~ 5500k, and the color rendering index shall not be less than 80.

4. The average illumination of the classroom desktop shall not be less than 300lx, and the illumination uniformity shall not be less than 0.7; The average illuminance on the blackboard surface shall not be less than 500lx, and the illuminance uniformity shall not be less than 0.8.

5. The lamps are installed by suspenders and evenly arranged according to the longitudinal direction of the classroom (the long axis of the lamps is perpendicular to the blackboard). The lighting power density of the classroom shall not be higher than 11W / ㎡, and it should be lower than 9W / ㎡ in conditional areas. The vertical distance (g) from the lamp to the desk shall not be less than 1700mm.

6. When calculating illuminance in lighting design, its maintenance coefficient shall be 0.8.

Therefore, the importance and urgency of doing a good job in the lighting transformation of primary and secondary school classrooms, providing students with a standard lighting environment and protecting students' eyesight are self-evident. It is recommended that all primary and secondary schools and institutions (including public school classroom lighting, private school classroom lighting, private school classroom lighting, experimental school classroom lighting, educational institutions, etc.) choose "Huahui lighting"!

As a promoter of Campus Lighting health, Huahui lighting is the first batch of qualified units for high-quality lighting environment in classrooms in South China. It is also the "top ten educational lighting brands" in China's lighting industry in 2020. It strictly controls the color temperature, glare, blue light, illumination and other problems in educational lighting to avoid the harm of bad lighting to children's visual health!

Huahui lighting has designed special lighting fixtures for classroom - led eye protection classroom lamp and led eye protection blackboard lamp, which meet the national standard. The average (constant) illuminance of the desk is greater than 300lx and the illuminance uniformity is 0.7; The blackboard maintains an average (constant) illumination of 500lx, and the illumination uniformity is 0.8; The color rendering index is greater than 90, and the color reduction is high; The grid anti glare design is adopted, and the glare value is less than 16, which is not dazzling; The color temperature is 5000K, comfortable and soft; The illumination of the whole classroom is uniform, without stroboscopic and blue light hazards.

The use of Huahui led eye protection classroom lamp and led eye protection blackboard lamp can be combined with Huahui lighting aiot intelligent education lighting overall solution. Through the self-developed intelligent lighting products, equipped with self-developed intelligent boxes (such as intelligent distribution box or intelligent air switch), the lighting mode that meets the needs of teaching can be easily switched by using intelligent full touch screen scene switch, remote control or mobile phone app, Realize the intelligent requirements of constant illumination, one key scene control, curtain linkage, ultraviolet sterilization and so on!

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