2009, Mayor of Los Angeles Antonio Villaraigosa launched the Los Angeles LED road lighting energy and efficiency programs, plans to use LED Street Lights replace the then 140,000 road lighting, which is the world the largest LED lighting replacement plan.

Los Angeles LED Street Light Replacement Project is an obvious example, with a high initial cost in exchange for road lighting electricity savings. Before replacing the LED lighting, in addition to the annual emissions of 110,000 tons of carbon dioxide in the environment outside of Los Angeles street lighting will spend $ 15 million annually, accounting for public expenditures from 10% to 38%. LED Street Lights not only have high luminous efficiency, longer life expectancy, but also have low maintenance costs.

Los Angeles LED Street Lights replacement project is expected to cost $ 57 million, total duration of more than four years. In the above funds have $ 40 million in loans, $ 16 million for the Los Angeles water and power sector return of funds, in addition to the $ 3.5 million for street maintenance assessment fund. Through this project to bring electricity savings after paying off loans, the annual savings in electricity for the Los Angeles and maintenance costs of up to $ 10 million.

Since Los Angeles began to change after the LED lights, LED lighting replacement tide began to sweep the country. 2012 Baltimore completed 70,000 LED street lighting retrofit in annual savings of more $ 2 million. Portland, Oregon unexpectedly late start this year, began the transformation plan. Other major cities such as San Francisco, San Antonio and Seattle street lighting will also be replaced.