Scientist collected information from around the world for create artificial lights. From the artificial lights more than 80%of the world’s population lives under light-polluted skies. Dr Christopher Kyba found that main causes of light pollution are street lights and light windows from our homes. Lighting was essential for explication and security but technology wanted to improve because many street light are not well designed.
In conclude, the study recommends that street light should be able dim or turn off in unused time. this help to recede light pollution and energy using.