Let There Be Light—known to the U.S. Army as PMF 5019—is a documentary film directed by American filmmaker John Huston (1906–1987). It was the last in a series of four films directed by Huston while serving in the U.S. Army Signal Corps during World War II. The film was produced in 1946 and was intended to educate the public about post-traumatic stress disorder and its treatment among returning veterans, but its unscripted presentation of mental disability caused the U.S. government to suppress the film, and it was not released until the 1980s.