in the catering service stage, the gears of windows and the like should be set in the basic lighting. A good combination of light and shade can not only play a lighting role, but also divide functional areas through light and shade, reality and reality. Dividing areas by lighting instead of physical character files not only saves space and decoration costs, but also creates a more perfect dining atmosphere. Important parts of restaurants, such as halls, dining tables and aisles, can be distinguished by different modal lighting.