With the development of science and technology, city’s lighting demand increase rapidly, When the night coming, all over the city with colorful lights. Today, everyone wants to make the place where live or work beautiful and bright with lighting. Therefore, people like to design and install various lighting when decorating house, office, school etc… After that, the high electricity cost become a headache. We may know the news from TV said that the government is encouraging upgrade traditional lights to LED lighting which can help save a lot of energy. However, when we find that LED lamps price are much higher than those traditional lamps, we have to wondering “How led lights can save electricity and energy at home? We will analyze and compare LED lights and ordinary lamps from various aspects, and see if it’s worth to upgrade from conventional lamps to LED.