Lighting, as an important part of urban life, is essential for daily outdoor activities. It not only brings convenience and safety to people, but also affects the nightlife of the city. The lighting system is up-to-date with the development of technology. Dedicated and meticulous lighting designers, along with specialized lighting projects, have made the city look more magical at night and have stimulated peoples enthusiasm to participate in all sorts of activities. In the city, the dark night was lit up by colorful lights. Streetlights line up the roads, like a bright ribbon on the ground, clearly delineating the lines on the roads and sidewalks; colorful neon signs stand out, with its attractive atmosphere shining in the dark sky; the shape of buildings are lightened up, making the building unique. The street, pedestrian overpass or even port also play differently under different lighting conditions. The cityscape at night is like painting, in which light plays an important part. With the development of the times, residential street lights, downtown streetlights, road landscape lights, landscape lights, urban logo lights and billboard lights have become a bright scenery line in many cities. In addition to these lights, city nightscapes sometimes use the play of shadows to create a completely different, dreamlike atmosphere. A good lighting design is the highlight of a city and can even become popular around the world. In conclusion, lighting cannot only help people to see clearly but also create a dreamy atmosphere and decorate the cities for people to enjoy. Therefore, the design of lighting should be more stringent and yet full of opportunities to make the cities a better place to live in.