Influence of classroom light environment on students vision

1. The importance of classroom light environment

A good classroom light environment can provide students with comfortable lighting quality, improve learning efficiency, reduce visual fatigue, and help maintain the health of teachers and students. The lighting of school classrooms should take visual health and comfort as a consideration. Because when students are studying in the classroom, they are almost all staring at close range. In order to adapt to the classroom environment, the human visual organ adjusts itself, which makes the eye muscles too tense; Learning in the classroom lighting environment will cause visual and physiological diseases. For students, if the classroom has a comfortable and well-equipped lighting environment, the learning efficiency can be improved; for teachers, if the classroom is in a well-equipped and comfortable lighting environment, it is more likely to achieve a more effective classroom effect with half the effort. The role of light environment can be basically divided into two aspects: psychological and physiological:

1. Psychological aspects:

(1) A comfortable lighting environment can make students have a good psychological feeling;

(2) A comfortable lighting environment can stimulate students' enthusiasm for learning;

(3) Good classroom lighting can improve the efficiency of visual work.

2. Physiological aspects:

(1) A comfortable lighting environment can avoid diseases on the visual organs and prevent visual diseases;

(2) A comfortable lighting environment can avoid light pollution and maintain the health of teachers and students.

Based on the current national standard GB 7793-2010 "Classroom Lighting and Lighting Hygiene Standards for Primary and Secondary Schools" and the renovation experience, we suggest that classroom lighting should have sufficient illuminance, good illuminance uniformity, good color rendering, less glare and high At the same time, it is necessary to consciously limit energy consumption while illuminating and lighting the classroom and improving the efficiency of work and study. Truly provide, high-quality, high-efficiency healthy lighting.

2. The basis for the transformation of classroom lighting

The indicators in the renovation of classroom light environment should be set according to GB 7793-2010 "Classroom Lighting and Lighting Hygiene Standards for Primary and Secondary Schools", and refer to various international similar standard values. GB 7793-2010 "Classroom Lighting and Lighting Hygiene Standards for Primary and Secondary Schools" requires the following:

(1) The maintained average illuminance value of the classroom desktop should not be lower than 300lx, and its illuminance uniformity should not be lower than 0.7;

(2) The average illuminance value of the classroom blackboard should not be lower than 500lx, and its illuminance uniformity should not be lower than 0.8;

(3) The uniform glare value of the classroom is not greater than 19;

(4) The low hanging height of classroom lamps from the table top should not be less than 1.7 meters;

(5) Under the condition of maintaining the average illuminance of 300lx, the lighting power density of the classroom is not more than 11W/m2.

3. The effect achieved by the transformation

After the light environment is transformed, the average illuminance of the classroom desktop is increased to more than 300LX, and the illuminance of the blackboard is increased to more than 500LX, ensuring sufficient lighting for teachers and students to carry out normal teaching activities;

The illuminance uniformity of the transformed classroom is above 0.7, and the illuminance uniformity of the blackboard is above 0.8, which makes the overall lighting environment of the classroom softer and more comfortable; the light environment transformation adopts a light source with a color temperature of 6500K, and the color rendering index of the light source is greater than 80 to ensure that teachers and students can obtain Real viewing angle experience; the uniform glare value (UGR) of the classroom is less than 16, which significantly improves the lighting comfort; the electronic ballast in the new energy-saving is adopted to solve the potential viewing angle light environment pollution caused by the stroboscopic problem; All classroom lighting power density is controlled below 11W/m2 to achieve the purpose of energy saving and consumption reduction. ---- Education lamp manufacturers