How to choose lamps for road lighting and how to install road lighting

 

1. The brightness of road lighting. That is, there is enough intensity to ensure that vehicle drivers and pedestrians can see obstacles, pedestrians, vehicles and the situation around the road on the road.

2. The uniformity of road lighting. That is, the distribution should be roughly uniform.

3. The degree of glare interference. That is, effectively control the harmful effects of glare on vehicle drivers and pedestrians.

4. The guiding nature of lighting. That is, make appropriate settings according to the road conditions so that vehicle drivers and pedestrians can effectively obtain information such as the direction and inclination of the road ahead, which is especially important for roads with many bends and intersections. Reasonable application of lamps can prevent glare.

 

illuminators used for road lighting include high-pressure sodium lamps, low-pressure sodium lamps, electrodeless lamps, metal halide lamps, fluorescent lamps, new Somin xenon street lamps, solar street lamps, LEDs, etc. Incandescent lamps, high-pressure mercury lamps, and low-pressure sodium lamps have been gradually eliminated due to defects in light source performance. Illuminators should use light energy reasonably to prevent glare. The light emitted by the illuminator should be irradiated at the required angle and fall on the road surface in a specified pattern. The light distribution is uniform, the road surface brightness is high, and the glare is small. To reduce glare, light distribution control can be given above the maximum light intensity.

 

The selection of light sources should comply with the following provisions:

1. Expressways, trunk roads, secondary trunk roads and branch roads should use high-pressure sodium lamps and LED intelligent street lights;

2. High-pressure sodium lamps or low-power metal halide lamps or LED lamps are suitable for mixed traffic roads of motor vehicles and pedestrians in residential areas;

3. LED street lights can be used for motor vehicle traffic roads with high color recognition requirements in the city center and commercial center;

4. Commercial pedestrian streets, residential pedestrian roads, and sidewalks on both sides of motor vehicle traffic roads can use low-power metal halide lamps, thin-diameter fluorescent lamps or compact fluorescent lamps, LED lamps, and solar street lights.

Self-ballasted high-pressure mercury lamps and incandescent lamps should not be used for outdoor lighting road lighting.

 

Motor vehicle lane lighting should use functional lamps that meet the following provisions:

1. Expressways and trunk roads must use cut-off or half-cut-off lamps;

2. Secondary trunk roads should use half-cut-off lamps;

3. Branch roads should use half-cut-off lamps.

Pedestrian streets, pedestrian roads, pedestrian tunnels, pedestrian bridges, and non-motorized vehicle lanes in commercial areas that need to be equipped with separate lights should use lamps that combine functionality and decoration. When decorative lamps are used, the upward luminous flux ratio should not be greater than 25%, and the mechanical strength should comply with the provisions of the current national standard "General Safety Requirements and Tests for Lamps" GB7000.1.

When using high-pole lighting, floodlights or cut-off lamps with appropriate power and light distribution should be selected according to the characteristics of the site.

When using closed road lighting lamps, the protection level of the light source cavity should not be lower than IP54. For roads and places with severe environmental pollution and difficult maintenance, the protection level of the light source cavity should not be lower than IP65. The protection level of the lamp electrical cavity should not be lower than IP43.

Lamps with good corrosion resistance should be used in areas or places with high levels of corrosive gases such as acids and alkalis in the air.

In places prone to strong vibration, such as large bridges where motor vehicles pass, the lamps used should comply with the vibration-proof requirements specified in the current national standard "General Safety Requirements and Tests for Lamps" GB7000.1.

High-intensity gas discharge lamps should be equipped with energy-saving inductive ballasts, and light sources with lower power can be equipped with electronic ballasts.

The installation distance between the trigger, ballast and light source of the high-intensity gas discharge lamp should meet the product requirements.