The article discusses how natural light (daylight) benefits buildings and how architects are now focusing on bringing more daylight in to reduce the need for artificial lighting. The researchers worked on designing and constructing mirror systems and vertical daylighting devices for office buildings in dense urban areas. By improving these systems, they aimed to make office spaces brighter without using as much electricity. This study will help set design standards based on past data. By testing these new systems, they hope to create a design manual for better daylighting in future buildings.