For what reason might we at any point give lighting by stopping water bottles on the rooftop?

Using water bottles on rooftops for lighting is a method to create simple, cost-effective daylight illumination. The concept involves placing clear water bottles filled with water through holes in the roof, which act like large lenses or light pipes. When sunlight hits the water bottles, it refracts and diffuses, illuminating the interior of the building with natural light. This technique can help reduce the need for artificial lighting during the day, saving energy and providing a sustainable lighting solution. It is particularly useful in areas with abundant sunlight and for structures where energy efficiency is a priority.