Georgia Power is the largest subsidiary of US utility holding company Southern Company. The regulated utility provides electricity to about 2.4 million residential, commercial, and industrial customers throughout most of Georgia. It has interests in about 20 fossil-fueled, 2 nuclear, and 20 hydroelectric power plants that give it about 22,000 MW of generating capacity. When necessary the company purchases excess power from nine small power producers. Georgia Power sells wholesale electricity to several cooperatives and municipalities in the region. The utility also offers energy efficiency, surge protection, and outdoor lighting products and services.