Lime Energy Co. is a provider of energy efficiency and renewable energy design/build solutions. The Company operates in two segments: Energy Technology and Energy Efficiency Services. The Company’s core Energy Efficiency Services business, which represented 96% of its revenue, during the year ended December 31, 2008, provides energy efficiency engineering and consulting, as well as the development and implementation of energy efficient lighting, mechanical, electrical and water services, building envelope weatherization, and renewable energy solutions. Through its Energy Technology business, which represented 4% of the 2008 revenue, Lime Energy Co also offers a line of controllers under the eMac and uMac brand names that provide continuous management of heating, ventilation and air conditioning (HVAC) and lighting equipment using wireless communication technology. On June 11, 2008, the Company acquired Applied Energy Management, Inc. (AEM).