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Anonymous users2024-02-06Conventional roadway lights are divided into three types according to light distribution: truncated light, half-truncated light and non-truncated light, the maximum light intensity direction of the truncated lamp is 0-65°, and the maximum light intensity of the half-truncated light type is 0-75°. The maximum allowable value of the light intensity emitted in the specified angular direction, the truncated roadway light exceeds 90 °, and the maximum non-truncated light can only reach 80 °, the main road of the expressway and Yingbin Road, the main road leading to the ** organ and large public buildings, the road center or commercial center of the city, the road of large transportation hubs and other trunk roads are strictly prohibited from using non-truncated roadway lights, and non-truncated roadway lights shall not be used in secondary trunk road branch roads, residential roads mainly for pedestrians and non-motorized vehicles.
Full cut-off luminaire:
Lamps with a maximum light intensity direction of 0° 65° and a maximum allowable light intensity of 10cd 1000lm and 30cd 1000lm in the angle direction of 90° and 80° respectively.
semi-cut-off luminaire:
Lamps with a maximum light intensity of 0° 75° and a maximum allowable light intensity of 50cd 100lm and 100cd 1000lm in the angle direction of 90° and 80° respectively.
Non-cut-off luminaire:
Luminaires with a maximum permissible light intensity of 1000 cd in the direction of a 90° angle.
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Anonymous users2024-02-05Road lighting fixtures.
According to its light distribution, there are three types of light cut-off type, half-cut light type, and non-truncated light type lamps.
Distinction: Maximum light intensity direction: 0-65 degrees of light cut-off.
Half-cut light 0-75 degrees, non-truncated --。
Definition: Due to the strict horizontal light, the lateral extension of the light is suppressed, resulting in the darkening of the area around the road, almost no glare, and at the same time can obtain a high road surface, brightness and brightness uniformity.
Cut-off type luminaire full
cut-off
luminaire:
Lamps with a maximum light intensity direction of 0° 65° and a maximum allowable light intensity of 10cd 1000lm and 30cd 1000lm in the angle direction of 90° and 80° respectively.
Half-section luminaires.
semi-cut-off
luminaire:
Lamps with a maximum light intensity of 0° 75° and a maximum allowable light intensity of 50cd 100lm and 100cd 1000lm in the angle direction of 90° and 80° respectively.
Non-cut-off luminaires.
non-cut-off
luminaire:
Luminaires with a maximum permissible light intensity of 1000 cd in the direction of a 90° angle.
All in all, it's mainly about the angle of the beam (not the scattered light, etc.).
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Anonymous users2024-02-04Full cut-off luminaire:
Lamps with a maximum light intensity direction of 0° 65° and a maximum allowable light intensity of 10cd 1000lm and 30cd 1000lm in the angle direction of 90° and 80° respectively.
semi-cut-off luminaire:
Lamps with a maximum light intensity of 0° 75° and a maximum allowable light intensity of 50cd 100lm and 100cd 1000lm in the angle direction of 90° and 80° respectively.
Non-cut-off luminaire:
Luminaires with a maximum permissible light intensity of 1000 cd in the direction of a 90° angle.
Note: No matter how much luminous flux the light source emits, the maximum luminous intensity must not exceed 1000 cd, which is simply the angle difference between the main beam (not scattered light, etc.).
In order to reduce glare, the urban road lighting design standard (CJJ45 91) also stipulates that expressways and trunk roads must use cut-off and half-cut lamps; The secondary trunk road should be made of half-section light lamps; Half-cut lamps should be used for branch roads (see Table 2 for the distinction of cut-off type, half-cut type and non-cut-off type lamps). The elevation angle of the arrangement should not exceed 15 degrees; The maximum light intensity direction and vertical angle of the lamp should not exceed 65 degrees.
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Anonymous users2024-02-03on. Conventional roadway lights are divided into three types according to light distribution: cut-off, half-cut and non-cut-off, the maximum light intensity direction of cut-off lamps is 0-65°, and the maximum light intensity of half-cut light is 0-
75°。The maximum allowable value of the light intensity emitted in the specified angular direction, the cut-off roadway light exceeds 90°, and the non-cut-off light can only reach 80°, and the main road of the expressway and Yingbin Road lead to zheng
It is strictly forbidden to use non-truncated roadway lights on the main roads of FU institutions and large public buildings, roads in the city center or commercial centers, and large transportation hubs, and non-truncated roadway lights shall not be used on secondary trunk roads, branch roads, and residential roads mainly for pedestrians and non-motorized vehicles. Cut-off luminaires.
fullcut-off
luminaire:
Lamps with a maximum light intensity direction of 0° 65° and a maximum allowable light intensity of 10cd 1000lm and 30cd 1000lm in the angle direction of 90° and 80° respectively.
Half-section luminaires.
semi-cut-off
luminaire:
Lamps with a maximum light intensity of 0° 75° and a maximum allowable light intensity of 50cd 100lm and 100cd 1000lm in the angle direction of 90° and 80° respectively.
Non-cut-off luminaires.
non-cut-off
luminaire:
Luminaires with a maximum permissible light intensity of 1000 cd in the direction of a 90° angle.
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