Ceiling lights is a kind of electric lighting fixtures that can provide general lighting source in the interior space of buildings. It has the advantages of wide illumination range, convenient installation, saving construction period. Ceiling lights can be divided into three categories based on its installation method, which are embedded type, hanging type and surface type. The embedded type installation is usually adopted in offices and public places, the hanging type is suitable for both residential and commercial buildings. The surface type ceiling lamps, as its name implies, are installed just beneath the ceiling surface, suitable for most places, such as living rooms, bedrooms and offices. Most ceiling lamps have two lighting layers. The main layer is usually used for daily lighting, for which LED, energy saving and energy-saving lamps are commonly used. The brightness of the second layer is usually set at a very low level, and halogen incandescent lamps are often used. This kind of soft lighting can be used as atmosphere illumination. Ceiling lights also have a variety of shapes and colors for users to choose. As a main decorative element, the selection of material, color, shape and light source of ceiling lights not only has the requirements for lighting, but also should conform to the decoration style of space, so as to have the perfect effect of lighting. In summary, the ceiling lights has many advantages, such as convenient installation, saving construction period, and various styles and colors. It is an important electric lighting equipment in interior space with wide usage.