Lighting is an indispensable part of human life. It provides us with illumination to light up our night, and more importantly, with the development of science and technology, it has become an indispensable part of our lives in terms of safety, health and everyday living. Lighting is mainly divided into natural lighting and artificial lighting. Natural lighting is mainly composed of sunlight, which is the most important source of illumination for human life, and moonlight, starlight and cloud illumination are auxiliary lights. Artificial lighting is mainly produced by electricity, and it has characteristics such as circuit connection, switch control, dimming, brightening, flashing, time delayed, and distance control. The application of lighting is very wide, such as illumination for urban streets, courtyards, factories, offices and other places; traffic signs, visual obstacles, etc. are indispensable for our daily lives. Intelligent lighting also plays a very important role in modern society. Smart street lamps, smart home lighting, smart city lighting, etc., greatly improve our living environment. Lighting not only brings us visibility, but also records the changing scenery of life in the dark. Therefore, I think efficient and green lighting is the best lighting. It should be our goal to make life better for the future with less resources and environmental protection.