Primarily a watercolorist, Lois Green Cohen is especially known for her paintings for projection at the Griffith Observatory. Born in 1919 in Chicago, Illinois, she studied at Carnegie Technical School in Pittsburgh, Pennsylvania, then worked in Pittsburgh as a fashion illustrator. She moved to Los Angeles in 1938 where she studied at the Chouinard Art Institute and at UCLA. Following her education, she worked as a motion picture illustrator and painted in her spare time. In 1945 she married Eugene Cohen, and in 1973 she began the Griffith Observatory project.

Her subject matter included figures, landscapes, animals, and urban scenes. She was a member of the California Watercolor Society.

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Source: Artists in California, 1786-1940, Edan Hughes