How many lumens is a street light?

What is a street light?

Street lamps refer to lamps that provide lighting functions to roads, and generally refer to lamps within the range of road lighting in traffic lighting. Street lights are widely used in various places where lighting is required. It consists of lamps, wires, light sources, light poles, light arms, flanges, and embedded parts.

Types of street lights

Street lights are generally classified according to the shape of the light they emit. The specific division method is recommended by the International Commission on Illumination (CIE) according to the three items of projection, expansion and control.

① Projection. It indicates the degree of diffusion of the light emitted by the lamp along the longitudinal direction of the road. It is divided into three types: short, medium and long.

② Expansion. It indicates the degree of diffusion of the light emitted by the lamp in the horizontal direction of the road. It is divided into three types: narrow, normal, and wide.

③ Control. It indicates the degree of glare controlled by the lamp, which is divided into three types: limited, medium and strict. There are several ways to install street lamps, such as bracket type, tall type, straight pole type, suspension cable type and wall suction type.

1. According to the height of street lights: high pole lights, middle pole lights, road lights, courtyard lights, lawn lights, underground lights;
2. According to the material of street light pole: hot-dip galvanized iron street light, hot-dip galvanized steel street light and stainless steel street light;
3. According to the light source of the street light: sodium street light, LED street light, energy-saving street light, new Somin Xenon street light.
4. According to the shape: Chinese lamp, antique lamp, landscape lamp, one-arm street lamp, two-arm street lamp.
5. According to the power supply mode: city circuit lights, solar street lights, wind and solar street lights

Street lights involve lighting technology and are suitable for street lights. The purpose is to design a high-efficiency electronic energy-saving street lamp with long life, low power consumption, high power factor, and low current harmonic content. The high-efficiency electronic energy-saving street lamp includes power grid high-voltage leakage branches R1 and C1, rectifier bridges D1-D4, power factor correction branches C2, D5, and D6, high-intermediate frequency glitch filter branches L1, L3, and high-frequency oscillation circuits connected in sequence BG1-BG2, start branch L2, C7 and tube T; save electricity by 80% compared with the previous street lamp; harmonic content THD <25%, extend the life of the tube by 3-4 times.

Are the lumen values of all street lights the same?

Lumen is a physical unit describing luminous flux. Physics interprets it as a candlelight (cd, Candela, unit of luminous intensity, equivalent to the luminous intensity of an ordinary candle) at a solid angle (a unit sphere with a radius of 1 meter, The angle represented by the spherical cone corresponding to the 1-square meter crown corresponds to the total emitted luminous flux generated at the center angle of the middle section (about 65 °) [1].

The installation of street lights is divided into main roads, secondary roads, branch roads, expressways, and conventional street light installation height: 8 meters, corresponding power 60-80W, distance 25-30 meters, 10 meters, corresponding power 120-150W, distance 30- 40 meters, 12 meters, corresponding power is 180-200W, distance is 40-50 meters, unconventional also has 14 meters and 35 meters high poles, the main road temporarily has no national acceptance standards, secondary road lights illumination value is 15-20LX , The branch road is 10-15LX, the expressway is 20-30LX, the installation height and the power used are determined according to the lane and the environment

1. The calculation formula for the average illuminance of street lamps is: average illuminance = F.U.K.N / S.W, (U is the utilization factor, k is the maintenance factor, S is the installation distance of street lamps, W is the width of the road, and N is the arrangement of street lamps). That is, the average illuminance of a street light refers to its central illuminance (the illuminance at the center of the street light) plus the surrounding illuminance and then divided by its area. This is the utilization coefficient method.
2. The utilization factor method of the average illuminance calculation formula: average illuminance = (light source luminous flux) × (CU) × (MF) ÷ area of ​​the irradiation area. Pedestrian road lighting standard value: The lighting standards for non-motorized vehicle lanes that are not separated from the motor vehicle lanes on one or both sides of motor vehicle traffic roads shall comply with the lighting standards for motor vehicle traffic roads; The average illuminance value should be 1/2 of the illuminance value of adjacent motor vehicle traffic roads. The sidewalk lighting on one or both sides of motor vehicle traffic roads. When sidewalks are mixed with non-motorized lanes, the average illuminance of the sidewalks is the same as that of non-motorized roads. When a sidewalk is separated from a non-motorized road, the average illuminance of the sidewalk should be 1/2 of the illuminance of the adjacent non-motorized road, but not less than 5lx.

How many lumens does a street light need is qualified?

This must be determined according to the grade of the road. The national and provincial roads require different standards. This depends on how many lumens per w of a single LED lamp bead, and secondly, how about the light output of the reflector of the lamp. Generally speaking, according to 70% light output, the number of lumens is about 6500 to 8000!

How to calculated the lumens for a street light?

Luminous flux refers to the derivation of radiant flux that is evaluated in accordance with the visual characteristics of the human eye in accordance with international regulations, and is represented by the symbol Φ (or Φr). The relationship between the luminous flux and the radiant flux is to turn left | turn to the right, where Km is the maximum value of the spectral optical performance, which is equal to 683lm / W; V (λ) is the standard spectral optical performance specified by the International Commission on Illumination (CIE) Efficiency function; Φeλ is the spectral intensity of the radiant flux. The unit of luminous flux is lm (lumens); λ is the spectral optical efficiency. 1 lm is equal to the luminous flux emitted by a point light source with a uniform luminous intensity of 1 cd (candela) within a solid angle of 1 sr (spherical degree), that is, 1 lm = 1 cd · sr. The nominal luminous flux of a 40W ordinary incandescent lamp is 360lm, the nominal luminous flux of a 40W daylight fluorescent lamp is 2100 lm, and the luminous flux of a 400 W standard high-pressure sodium lamp can reach 48000 lm.

If the light effect (lumen / watt Lm / W) and power (watt W) are known, then the luminous flux = light effect * power.

Known illuminance (lumen / decimeter Lm / MM) and illuminated area (square meter MM), then the luminous flux = illuminance * area. Luminous flux calculation: the actual luminous flux of the lamp (lumen lumens) / (single luminous flux * number of light sources)

What is the important impact of street lights on people’s daily lives?

With the acceleration of urbanization in China, LED street lights are an important part of urban lighting. If the street lights are not installed satisfactorily, it will seriously affect the daily lives of our residents. First, the street lights are installed too high, and if they are always lit at night, if they are facing the residents’ windows, the residents will not be able to approach the windows at all. When you approach, the eyes will be glare. Residents’ houses are so spotted now. You can’t go near the window if you go around. If the street lights are turned on from 6 to 7 in the evening to 6 or 7 in the morning, how do residents live? Do they pull the curtains 24 hours? Second, it is too close to the residential building. The street lights hit the ceiling directly, making the room look like a light. Makes people blur the line between day and night. The circadian clock is seriously disordered, which seriously affects people’s daily life. Therefore, it should be fully considered before installation. In fact, the right to rest is a basic right granted to citizens by the law.

Only by taking a good rest can you work well and contribute to the country. In fact, this is also a kind of light pollution. It is hoped that on the basis of installing street lights to brighten the city and serve the people, we will consider things more comprehensively and reasonably, so that ordinary people will benefit without defects. During the spray painting process of Zhongshan Mingjian Lighting, the odor was severely excessive and polluted the surrounding environment. After the residents complained, the improvement was very good. I hope that more manufacturers will consider the impact of some street lights on our lives in the production process.

With the acceleration of urbanization in China, LED street lights are an important part of urban lighting. If street lights are not installed satisfactorily, it will seriously affect to the daily lives of our residents.

First, the street lights are installed too high, and if they are always lit at night, if they are facing the residents’ windows, the residents will not be able to approach the windows at all. When you approach, the eyes will be dazzling. Residents’ houses are so spotted now. You can’t go near the window if you go around. If the street lights are turned on from 6 to 7 in the evening to 6 or 7 in the morning, how do residents live? Do they pull the curtains 24 hours?

Second, it is too close to the residential building. The street lights hit the ceiling directly, making the room look like a light. Makes people blur the line between day and night. The circadian clock is seriously disordered, which seriously affects people’s daily life. Therefore, it should be fully considered before installation. In fact, the right to rest is a basic right granted to citizens by the law. Only by taking a good rest can you work well and contribute to the country. In fact, this is also a kind of light pollution. It is hoped that on the basis of installing street lights to brighten the city and serve the people, we will consider things more comprehensively and reasonably, so that ordinary people will benefit without defects. During the spray painting process of Zhongshan Mingjian Lighting, the odor was severely excessive and polluted the surrounding environment. After the residents complained, the improvement was very good. It is hoped that more manufacturers will consider it better during the production process.

Market conditions

The stock of street lamps in China is between 28 million and 30 million. In recent years, the number of new street lights is 15% -20%, about 3-6 million. According to the annual increase in the number of street lamps are LED lamps, each $1000-2000 calculation, the annual increase of 3 billion to 6 billion yuan. The failure rate of LED street lights over 6000 hours is less than 1%. Lighting accounts for about 19% of the electricity consumption in the world. If the efficiency of the lighting system used in the world is doubled than the existing one, it can be said that it is equivalent to removing half of Europe’s electricity consumption and heat removal.

A recent global independent test has been established. LED street lights can save up to 85% of energy. In December 2011, China produced 250 million sets of lamps and lighting devices, a year-on-year increase of 12.45%. From January to December 2011, the output of lamps and lighting devices nationwide reached 2.5 billion sets, a year-on-year increase of 6.38%. From the perspective of the output of various provinces and cities, from January to December 2011, the output of Zhejiang’s lamps and lighting devices reached 1.07 billion units, an increase of 9.13% year-on-year, accounting for 42.40% of the total national output; 870 million units, a year-on-year decrease of 4.44%, accounting for 34.43% of the country’s total output.

In 2011, the Chinese LED market will grow from US $ 4.7 billion in 2010 to US $ 5.8 billion, an increase of 23%. LED has become a popular product made in China, and it is an attractive investment area. In addition, government support for the industry appears to be paying off. It is estimated that China’s LED market will reach US $ 6.9 billion in 2012 and US $ 11.1 billion by 2015, with a compound annual growth rate of 17.7% from 2010 to 2015. The rapid development of China’s street lamp construction has continued to improve the quality of road lighting. High-intensity gas discharge lamps have been widely used. It has improved the investment environment of our country, promoted rapid economic development, facilitated the life of the people, beautified the city, and became an outward-looking modern city the construction played a big role. Market outlook forecast

First: energy saving and energy saving, energy consumption is reduced by 70-80%, high luminous rate, 10 times that of ordinary incandescent lamps, and 5 times that of ordinary energy-saving lamps. Second: environmental protection and pollution-free: fluorescent tube energy-saving lamps contain mercury, full halogen lamps, ultraviolet rays. Strong, the electromagnetic interference of induction lamp is large. The LED energy-saving lamp does not contain lead, mercury and other elements, has no pollution to the environment, and can be recycled. No filament, fragile glass shell and mercury coating, no ultraviolet and infrared radiation, no harm to human body. Three: long life; 50,000 hours of life, theoretically ten years, 12 hours per day. Four: The concentration of emitted light energy is very high. Five: the response time is very fast, the light is the brightest effect. Unlike ordinary energy-saving lamps, it takes a while to reach the brightest. Sixth: constant current, even low voltage can be driven without affecting brightness Seventh: good shock resistance, solid and reliable. With the rapid expansion of the number of underground parking lots in high-rise buildings and commercial centers, the grades are getting higher and higher, the facilities are becoming more and more complex, and the energy consumption is also increasing. In terms of lighting alone, its energy consumption accounts for about 80% of the operating energy consumption of underground parking lots. Taking an underground parking lot with 1,000 lights as an example, the annual lighting energy consumption is as much as 350,000 kWh. It should be said that with the large-scale construction of underground spaces such as underground cities, subways, underground parking lots, etc., these places that need uninterrupted lighting around the clock. Today, energy saving and emission reduction are becoming increasingly important. Business opportunities, LED street lights will have unlimited market prospects.