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Why did carbon arc lights replace early tungsten lamps in filmmaking?

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Director Steven Spielberg and camera operator Michael Chapman film next to a large mechanical shark on the set of the 1975 movie Jaws. — motion-picture technology Director Steven Spielberg holding the movie camera, assisted by camera operator Michael Chapman, during the filming of *Jaws* (1975).

In the context of motion-picture production, the transition between lighting technologies was driven primarily by the requirements of sound recording and film sensitivity.

While carbon arc instruments, such as the Klieg light, were adapted for filmmaking around 1912, they were eventually replaced by incandescent lighting following the industry's conversion to sound in 1927. This change occurred because the carbon arc lights produced a sputtering noise that interfered with sound recording. Consequently, incandescent lighting, specifically Fresnel-lens spotlights, became the standard for studio production.1

It is important to note that this was not a permanent shift; the introduction of Technicolor led to a partial return to carbon arc lights because incandescent light negatively affected the colors recorded on the film. However, by approximately 1950, economic pressures led to the rebalancing of Technicolor film to accommodate incandescent light once again.1