Lime Energy Co. is a provider of energy efficiency solutions for small businesses under utility demand side management programs. The Company provides utilities with the customer relationship services that they need in order to satisfy their shareholders, regulators and customers. It operates through the Energy Efficiency segment. It offers utilities energy efficiency program delivery services targeted to their small and medium-sized business customers. These programs include energy efficient lighting upgrades, mechanical upgrades, building controls, refrigeration, pool pumps, building shell improvements and appliance recycling. Its small business energy solutions programs provide an avenue for its utility clients to offer products and services to a hard-to-reach customer base. Its Utility Program Management Services include program design, program administration, marketing and sales, customer recruitment, auditing and implementation of energy efficiency projects.