The world’s largest light emitting diode (LED) conversion project to date is under way in Los Angeles, Calif, according to a post by Jim Brodrick, the lighting program manager for the Department of Energy’s Office of Energy Efficiency and Renewable Energy.

The post  said that in the project’s first phase alone, the city retrofitted over 141,000 streetlights, reducing energy use by 63% and saving the city $7 million a year in electricity costs. The project is expected to reduce carbon emissions by 47,583 metric tons annually, which is equivalent to removing about 10,000 cars from Los Angeles roadways per year. Brodrick also said:

“Lessons learned from this project were discussed during the Energy Department’s (DOE) Municipal Solid-State Street Lighting Consortium (MSSLC) webinar in September. More than 560 attendees gained insight from Ed Ebrahimian, director of Los Angeles’ Bureau of Street Lighting. To date, more than 370 municipalities, utilities, and government agencies have signed on as primary members of MSSLC.”