The experience of department store with large skylights has shown that sunlight entering a shopping mall can increase sales  The department store's large skylights allow sunlight to enter half the mall, reducing the need for artificial lighting, while the other half of the mall has only artificial lighting
During the opening hours of the night, the sales volume of each department under the Skylight in the department store was no higher than that of the other departments
 Since the mall opened two years ago, sales from departments on the skylight side have been much higher than sales from other departments