Lighting is an important part of our daily life, it is everywhere in our life. It has many different types like natural light, electrical light, fluorescent and LED light, etc. Natural light is one of the oldest sources of lighting. Its advantages are obvious, such as its free of cost, it will never pollute the air, and its energy efficiency is high. But its disadvantages are also obvious, such as its weak intensity, it can not be adjusted as needed, and it also has certain limitations in the range of applications. The electrical light is the most commonly used lighting source, it can be adjusted to meet different needs of light, it is energy efficient, and its price is relatively low. But the disadvantage of electrical lighting is that it consumes electricity, it is not environment-friendly. Fluorescent lighting has a higher illumination than electrical lighting, and its energy efficiency is high. But the disadvantage is that its start-up speed is slow, and it also needs a lot of maintenance. LED lighting is one of the most popular lighting sources nowadays, because of its energy-saving, eco-friendly, fast-response, and long-lifespan advantages. Its brightness and range of application can be adjusted to meet different needs, and it is also widely used in all walks of life. But its disadvantage is the high cost of purchasing and installation. In summary, today we have a variety of lighting sources to meet different needs of light. Different lighting sources have different advantages and disadvantages. We have to choose the right lighting source for the right occasions.