Lime Energy Co. engages in the designing and implementing energy efficiency programs for utilities in the United States. It offers direct install energy efficiency solutions for small and mid-size commercial and industrial business programs to enhance energy efficiency, and reduce energy-related expenditures and the impact of energy use on the environment. The company’s solutions comprise energy efficient lighting upgrades and energy efficient mechanical upgrades. It also provides utility program management and implementation services, which comprise program design, program administration, customer recruitment-marketing and sales, and auditing and implementation of energy efficiency projects. The company was formerly known as Electric City Corp. and changed its name to Lime Energy Co. in September 2006. Lime Energy Co. was founded in 1997 and is headquartered in Newark, New Jersey. Lime Energy Co. operates as a subsidiary of Willdan Group, Inc.