WGL Holdings, Inc., is a public utility holding company located in the United States that serves customers in the District of Columbia, Maryland, and Virginia. The companys Washington Gas Light Company subsidiary distributes natural gas to more than one million customers. WGL is a diversified energy business that provides natural gas, electricity, green power, carbon reduction and energy services and natural gas exploration, production, and storage though its subsidiaries, including Washington Gas, Washington Energy Services, WGL Midstream, and Hampshire Gas. Washington, D.C., was decades slower than some other eastern U.S. cities to move from candles or oil to gas for lighting. Baltimore was first, in 1816; New York City was partially lighted with gas in 1825. In 1840, when a gas company for Washington remained only a proposal, a U.S. Senate document argued for gas' salutary effect on the local economy: "fancy and other stores would introduce this light, and thus add to the cheerfulness of the public ways."