Lighting is necessary for our life.In the past, when the night falls, people use the bonfire to send out a faint light and partially illuminated the darkness to protect themselves from the wild animals. However, since the invention of electrical lighting, everything has changed. Nowadays, we are blessed with a variety of electric lighting, ranging from street lamps to high-powered LEDs, with different color shades. In addition, advanced light sources, such as laser lighting, helps to form a modern and unusual style. Besides its practical uses, lighting also plays an important role in the atmosphere of peoples lives. Different lights create different atmospheres. For example, the warm yellow light is like the warm sunshine, making people feel warm, comfortable and relaxed. On the contrary, the cool white light can bring enthusiasm, prosperity and success. All in all, lighting is essential for our life. Depending on its purpose, lighting helps people creating a safe, comfortable and pleasant environment. From street lamps to interior design, it flashes in peoples lives brightening the whole city.