The Rio Olympics is a worldwide sports event taking place every 4 years. This time in Rio Olympics 2016, millions of people fly to Rio to enjoy the games, making airports much busier than usual. CHICAGO O’HARE INTERNATIONAL AIRPORT is the one of the busiest airports in the world. Daily passenger volume caused a large energy consumption. In order to save energy and cost,the Sansi energy saving LED lighting solutions became the first choice to bright up the airport.