The story
Aaron Halperin, who immigrated to the United States from Kiev in the 1890s, founded the company in 1915.
The company performed a number of high-profile assignments, including installing lighting systems in Wrigley Field, the John Hancock Center, and O'Hare International Airport. It also lit State Street in Chicago in 1958, making it – according to the Chicago Tribune – the brightest thoroughfare in the world.
In 2007, it had 250 employees.
From Wikipedia’s article on Commercial Light Company, shared under CC BY-SA 4.0.3