Standard value of light intensity
1. The light intensity standard of appearance inspection is 130,50,150,200,300,500,750,1000, 1500, 2000, 3000, 5000lx. Lx is the unit of illuminance.
2. Generally at 0.5-5000lx, measured by illuminance meter. To maintain the average illuminance on the work surface or reference plane, it is stipulated that the average illuminance on the surface shall not be lower than this value. It is the average illuminance on the specified surface when the lighting must be maintained, which is needed to ensure visual safety and visual efficiency at work.
3. The standard of street lamp illuminance is 89lux. the average illuminance calculation formula of street lamp is: average illuminance = F.U.K.N/S.W, (U is utilization coefficient, k is maintenance coefficient, S is street lamp installation distance, W is road width, N is street lamp arrangement).
4. The incandescent lamp can emit about 156 Lux of light per watt, that is, if the commonly used incandescent lamp is 100W, the light intensity is 1256 Lux, and the luminous efficiency of the fluorescent lamp is 3 to 4 times that of the incandescent lamp. The installation height of the light bulb and the presence or absence of the lampshade have a great influence on the light intensity.
5. It can be reduced by one level according to the standard value of the degree. When working for a short period of time; when the accuracy or speed of the operation does not matter; when the building grade and functional requirements are low. In general, compared with the standard value of illuminance, the design illuminance value can have a deviation of-10%.
6. Illuminance E is the luminous flux per second, E = φ / s. The standard value of ordinary residential illuminance is generally about 150LX. The standard value of illuminance in ordinary schools and offices is generally about 300LX. 500LX should be used in art room, teacher blackboard, design room and senior office. Indoor lighting can be designed according to the following ideas: Emin=Eav/Z.
Illuminance testing standard
1. The light intensity standard of appearance inspection is 130,50,150,200,300,500,750,1000, 1500, 2000, 3000, 5000lx. Lx is the unit of illuminance.
2. The standard of street lamp illuminance is 89lux. the average illuminance calculation formula of street lamp is: average illuminance = F.U.K.N/S.W, (U is utilization coefficient, k is maintenance coefficient, S is street lamp installation distance, W is road width, N is street lamp arrangement).
3. The illuminance standard value refers to the average illuminance on the work surface or reference plane when the lighting device is maintained, and it is stipulated that the average illuminance on the surface shall not be lower than this value, this is the illuminance needed to ensure visual safety and visual efficiency at work.
4. If the lighting standard of the general reading room is 300lx, the lighting standard of the elderly reading room is 500lx. Table lamp main evaluation indicators desk lamp has a wide range of applications, including not only the most common reading and writing desk lamp, but also the desk lamp that provides vertical illumination at the bedside and the desk lamp that provides transitional lighting in the hotel room.
What are the requirements for the installation height of general lighting in the factory building
1. Lamps and lanterns should not be installed directly above the high-voltage and low-voltage distribution equipment and bus in the substation. The height of the lamps and lanterns installed outdoors should not be less than 3 meters from the ground; when installed on the wall, the height from the ground should not be less than 5 meters.
2. General open lamps and lanterns, the distance from the lamp holder to the ground is not less than the following values (except when the voltage is used): (1) outdoor: 5m (installed on the outdoor wall); (2) factory building: 5m / 3) indoor: 2m / 4) the lamps and lanterns with the hoist of the soft cable are 0.m after the cable is unfolded.
3. According to the “Urban Road Lighting Design Standard (CJJ45-2015)”, the relationship between the light distribution type, layout and installation height and spacing of lamps and lanterns in Table 3 is as follows: Weff refers to the effective width of the road surface; the distance between S lamp poles; H refers to the installation height.
4. It shall be carried out in accordance with the regulations of the National Electrical installation regulations. You can participate in the designated legal low-voltage electrician training to get the specific application size details in the detailed regulations.
5. Indoor lamps and lanterns shall not be less than 4 meters from the ground and outdoor lamps shall not be less than 3 meters from the ground.
