Day for night
Encyclopedia
Day for night, also known as nuit américaine ("American night"), is the name for cinematographic
Cinematography
Cinematography is the making of lighting and camera choices when recording photographic images for cinema. It is closely related to the art of still photography...

 techniques used to simulate a night scene; such as using tungsten-balanced rather than daylight-balanced film stock or with special blue filters and also under-exposing the shot (usually in post-production) to create the illusion of darkness or moonlight.

Historically, infrared movie film was used to achieve an equivalent look with black-and-white film.

A great way to achieve this effect is to tune the white balance of the camera to a yellow source if there is no tungsten setting. Another way to make a more believable night scene is to underexpose the footage to the desired degree of night/darkness. This depends on the amount of light shown or believed to be in the given scene.

The title of François Truffaut
François Truffaut
François Roland Truffaut was an influential film critic and filmmaker and one of the founders of the French New Wave. In a film career lasting over a quarter of a century, he remains an icon of the French film industry. He was also a screenwriter, producer, and actor working on over twenty-five...

's film Day for Night
Day for Night (film)
La Nuit Américaine is a 1973 French film directed by François Truffaut. It stars Jacqueline Bisset and Jean-Pierre Léaud. In French, nuit américaine is a technical process whereby sequences filmed outdoors in daylight are underexposed to appear as if they are taking place at night...

(1973) is a reference to this technique.
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