First, illumination
1. The illuminance standard value shall be classified according to 0.5 , 1, 3, 5, 10, 15, 20, 30, 50, 75 , 100, 150, 200, 300, 500, 750, 1000, 1500, 2000, 3000, 5000lx.
2. The illuminance values ​​specified in this standard are the average illuminance values ​​on the working surface or reference plane. The average illuminance value of all types of rooms or places shall be in accordance with the provisions of Chapter 5.
3. When one or more of the following conditions are met, the illuminance of the working surface or the reference plane can be increased by one level according to the standard value.
(1) A fine work place with high visual requirements, when the distance from the eye to the recognition object is greater than 500 mm;
(2) When a continuous long-term intense visual operation has an adverse effect on the visual organs;
(3) Identifying moving objects, requiring identification time to be short and difficult to identify;
(4) When visual operations have an important impact on operational safety;
(5) When the brightness of the recognition object is less than 0.3;
(6) When the accuracy of the operation is high, and the error will cause a large loss;
(7) When the visual ability is lower than the normal ability;
(8) When the building level and function requirements are high.
4. When one or more of the following conditions are met, the illuminance of the working surface or reference plane can be reduced by one level according to the standard value.
1 When performing a short time of work;
2 When the accuracy or speed of the work does not matter;
3 When the building level and function requirements are low.
5. The illumination around the work surface may be lower than the illumination of the work surface, but it should not be lower than the value in Table 4.1.5.
6. In the lighting design, the corresponding maintenance factor should be selected from Table 4.1.6 according to the environmental pollution characteristics and the number of lamp wipes.
7. Under normal circumstances, the design illuminance value may be compared with the illuminance standard value, and may have a deviation of -10% to +10%.