Light S.A., together with its subsidiaries, engages in the generation, transmission, distribution, and sale of electric power in Brazil. The company distributes electricity in the state of Rio de Janeiro. It engages in the research, planning, building, operation, and exploration of generation and transmission systems; purchase, sale, import, and export of electricity, thermal power, and gas and industrial utilities; provision of consulting services in the energy sector; lease of real estate and personal properties; acquisition and sale of goods related to the studies and projects; implementation, operation, and maintenance of construction works and facilities; analysis of technical and economic feasibility; and hydropower generation activities. In addition, the company provides services to low voltage clients, including the assembly, renovation, and maintenance of facilities. Further, it offers technology solutions and systems for the operating management of public service concessionaires, including electricity, gas, water, sewage and other utility companies; and builds, installs, operates, and explores electric power plants. The company primarily serves residential, commercial, industrial, commercial, rural, government, advertising, and utility customers. The company was founded in 1899 and is headquartered in Rio De Janeiro, Brazil.