 The Slimline fluorescent ballast's public
introduction in 1946 was by Westinghouse and General Electric and Showcase/Display Case fixtures were introduced by Artcraft Fluorescent Lighting Corporation in 1946.During the following year, GE and Westinghouse publicized the new lights through exhibitions at the New York World's Fair and the Golden Gate International Exposition in San Francisco.Fluorescent lighting systems spread rapidly during World War II as wartime manufacturing intensified lighting demand.