The final entry in a trilogy of films produced for the U.S. government by John Huston. Some returning combat veterans suffer scars that are more psychological than physical. This film follows patients and staff during their treatment. It deals with what would now be called PTSD, but at the time was categorised as psychoneurosis or shell-shock. Government officials deemed this 1946 film counterproductive to postwar efforts; it was not shown publicly until 1981.

Girato interamente in un ospedale psichiatrico proprio poco dopo la fine della Seconda guerra mondiale, il documentario del giovane Huston, racconta i problemi dei veterani di ritorno dalla guerra - sindrome da disturbo post-traumatico e altri disordini neurologici legati all'esposizione al conflitto - descrivendo i sintomi e le eventuali cure.

Bouleversant témoignage sur les horreurs de la guerre censuré jusqu’en 1980, Que la lumière soit est aujourd’hui considéré comme l’un des meilleurs films jamais réalisés sur les conséquences psychologiques de la guerre.

Sommige teruggekeerde oorlogsveteranen hebben meer last van psychologische dan fysieke littekens. In deze film volgen we patiënten en personeel tijdens de behandeling.