What are the suitable conditions for school classroom lighting
For school classroom lighting, in addition to paying attention to natural light, we must pay more attention to artificial light, which, like natural lighting, prevents glare, prevents harmful light, and affects students’ eyesight; the state promulgated the "Hygienic Requirements for the Design and Installation of General Classroom Lighting in Primary and Secondary Schools". So what are the suitable conditions for school classroom lighting?
1. In terms of natural light:
is less than 20LX, visual fatigue is more serious;
Under the condition of 60LX, the degree of visual fatigue decreased significantly;
At 180LX, visual fatigue is less.
2. In terms of artificial light:
The average illuminance value should not be less than 300Lx;
The color temperature should be kept within the range of 2700K~7000K;
As a necessary source of lighting for school classroom lighting, artificial light sources/lighting fixtures must meet the following standards:
1. All classrooms should be equipped with artificial lighting.
2. The average illuminance value of the classroom desktop should not be less than 300Lx, and the uniformity of illuminance should not be less than 0.7.
3. The classroom blackboard should have local lighting, the microscopic average illuminance is not less than 500Lx, and the illuminance uniformity is not less than 0.8.
4. School classroom lighting should use a light source with a color temperature of 2700K to 7000K, and the color rendering index should not be lower than 80.
5. School classroom lighting should use small tube lights less than 26mm.
6. Classroom lighting fluorescent lamps should use energy-saving inductors.
7. School classroom lighting should not use naked lights. The minimum hanging height of the lamps on the table should not be less than 1.7 meters. The purpose is to reduce direct glare caused by lighting.
8. The uniform glare value (UGR) of school classroom lighting should not be greater than 19.
9. Under the condition of maintaining an average illuminance value of 300Lx for school classroom lighting, the power density should not exceed 11W/m2, and the target value should be 9W/m2.
10. When the school classroom lighting is designed for lighting, the maintenance system effect is 0.8.
