1 General
1.0.1 This standard is specially formulated for the purpose of designing underground building lighting to meet the long-term visual effects, ensuring advanced technology, safe use and convenient maintenance.
1.0.2 This standard applies to the lighting design of underground commercial hotels, hospitals and parking lots built, rebuilt and expanded.
1.0.3 The lighting design of underground hotels, hospitals and parking lots shall comply with the relevant national standards and norms in addition to complying with this standard. Civil air defense works should implement the current regulations of civil air defense works.
2 nouns, terms
2.0.1 Transition lighting is an illumination that is designed to reduce the brightness difference between the interior of the building and the outside world.
2.0.2 Ambient illumination The illumination of the outdoor horizontal plane on full cloudy days.
2.0.3 Annual average illuminance The annual average of the measured illuminance per hour measured half an hour after sunrise to half an hour before sunset.
3 illuminance standard
3.1 General provisions
3.1.1 Illumination values ​​for underground buildings are graded according to the following series: 0.5, 1, 2, 3, 5, 10, 15, 20, 30, 50, 75, 100, 150, 200, 300 and 500 Lx.
3.1.2 Illumination standard value refers to the average illuminance value on the reference plane of work, activity or living place.
3.1.3 The illuminance standard value is the maintenance illuminance value, and the maintenance factor should meet the requirements of Table 3.1.3.
Note: 1 for a particularly clean room such as the operating room can take 0.80;
2 This watch is suitable for fluorescent lamps and high-intensity discharge lamps. When using tungsten halogen lamps and incandescent lamps, the maintenance factor can be increased by 0.05.
3.1.4 For different activities or types of work of various types of buildings, the illuminance standard values ​​shall specify three values: high, medium and low. In general, the median value is taken, and the appropriate illuminance value can be selected according to factors such as the size of the building, the use situation, and the location.
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