Lighting is of great importance to people's lives, it can illuminate our lives and bring a warm and comfortable life to us. Lighting can be divided into natural lighting and artificial lighting. Natural lighting comes from the sunlight. It is most comfortable and natural. Take the sun as an example, it can provide us with enough illuminance, temperature, humidity, air flow, and even psychological security for our daily work and learning. Artificial Lighting is light from man-made sources, such as electric bulbs, fluorescent lamps, incandescent lamps, LED lights, halogen lamps and so on. These artificial lighting sources plays a very important role in the illumination of our daily public places, such as corridors, toilets, classrooms, stadiums and so on. In addition, lighting also plays an important role in our daily life. It can not only enable us to see clearly, but also has a certain protection effect on our sight. For example, when using computer and mobile phone for a long time, eyes may be tired or uncomfortable. At this time, you can use the appropriate lighting to reduce the damage to your eyes. In short, indoor lighting has become the most important part of our life, providing us with light and warmth, through which we can have a better living environment.