With the rapid development of China's economy and the continuous acceleration of the process of urban modernization, especially when human beings enter the 21st century, China's urban night scene lighting has gradually been attached great importance. This is because the city night light environment and landscape image become an inseparable part of the city style, beautiful city night scene can not only create a good environment for people's night activities, enrich people's nightlife, but also for the prosperity of the economy, the development of tourism, the establishment and performance of a city's night image, create a noble cultural atmosphere has a very important significance.

1, the social significance of urban lighting project into a new era, with the continuous improvement of people's living standards, only lighting has been unable to meet the needs of human needs, social development and commercial competition. Design and implement lighting projects for urban buildings and public Spaces, such as city squares, commercial and cultural streets, tourist landscapes, monumental buildings, historical buildings, cultural buildings, major government office buildings and traffic buildings, etc., with advanced flood lighting equipment to show their colorful, clear layers and distinctive light images at night. Build some high grade, good quality, and urban image of the light environment places, can be very good to set off the solemn, friendly, elegant style of the central area of the city, so that the city has a stronger sense of The Times, so as to increase the attraction of urban space, fully express the urban environment and cultural information and architectural aesthetics. Therefore, the use of lighting to improve the urban night landscape will have a positive impact on the development of the city's tourism industry and improve the living environment, and it will bring great social benefits to the city.

2, the economic benefits of urban lighting project With the continuous progress of society and the rapid development of the economy, the domestic large, medium and small cities have carried out the construction of night lighting system, the construction of these lighting projects to a certain extent to the country, to the individual has brought a lot of benefits. The construction of the lighting project makes the city feel strong, the streets become spectacular, and the business opportunities of the commercial street are promoted. Citizens buy their favorite goods in the new commercial street, and the number of people who consume in the commercial street will increase in proportion, thus increasing the turnover of businesses, increasing the national tax revenue, and making the market economy more prosperous.

3, urban lighting project is an indispensable part of modern urban life "city, make life better!" This is the slogan of the 2010 Shanghai World Expo. It is true that modern life cannot be separated from cities, but as the carrier of human life, it is far from enough to make cities light up. In today's energy shortage, this seems to be contrary to the international social theme of energy conservation, so some people think that the urban lighting environment causes a waste of economy and energy, and questions the construction of the urban lighting project, which is the misunderstanding of the urban lighting environment landscape. From the historical experience, the accident rate and crime rate have a considerable relationship with the night scene lighting, so that people in the beautiful environment, good quality of the city decent, self-esteem life, is the basis and fundamental of modern urban life.

4, the importance of beautifying the urban environment colorful night lighting can not only reproduce the city style, but also provide people with a good night vision environment and living environment, specifically can be explained from the following points of the city lighting project construction functions:

(1) Clear city outline. The outline of a city in daylight is determined by the shape, color and shade of the buildings on its edge. The more well-organized the city, the more closely integrated with the surrounding environment, the more difficult to distinguish the outline of the city; The city lighting at night clearly Outlines the outline of the city, which is clearly different from the surrounding area. When looking at the city from a height at night, the outline is complete and clear, intuitively reflecting the shape and scale of the city.

(2) Highlight the urban structure. The identification of urban structure, in addition to geomorphic features, mainly lies in the identification of different areas formed by urban roads and building groups. The city under the sun gives back all the information about its components, and the urban structure is hidden in it, which is difficult to distinguish. The night will be the city's secondary, affiliated part of the integration, becoming the black "bottom" part, the construction of the lighting project emphasizes the main part of the city, the essence of the part, become a bright "map" part, so that the urban structure highlights, easy to identify, both a sense of location and a sense of hierarchy and three-dimensional.

(3) Highlight the urban lines. In the city at night, the street lights with regular arrangement decorate the road into several strips of light interwoven in the city, the main and secondary, the street lights make the road structure clear and easy to distinguish.

(4) Highlight the face and point of the city. In the city at night, the buildings in the central area of the city are more concentrated, the light density is larger, the brightness is higher, and the urban landmark buildings are often located in the central area. Neon advertisements, light box signs, internal lights and external lights of buildings make the central area form a piece of bright areas embedded in the road network, so that the structure of the central area of the city is clear. The other parts of the city, that is, the spot light of the monomer lighting is more uniform, the light density is smaller, the brightness is lower, and the variety is less, which becomes the base of the urban lighting environment and plays an auxiliary role. To sum up, in modern cities, the construction of urban lighting projects will accelerate the pace of urban infrastructure construction, highlight the characteristics of the city itself, and create better conditions for enhancing the image of the city and improving the living environment of the citizens, which has very important significance and far-reaching impact.