How is light intensity defined in the context of lighting in film?

Light intensity in the context of lighting in film refers to the amount of light present in a scene or directed at a subject. This concept is crucial because it affects how images are perceived by the audience, influencing aspects such as mood, depth, and visibility of details. When filmmakers adjust light intensity, they manipulate how bright or dim a scene appears, thus directing viewers' attention and creating emotional impacts.

The other choices highlight different aspects of lighting that are also important in filmmaking. The focus of the light pertains to how concentrated or dispersed the light beams are, which affects the sharpness and edges of shadows. The color temperature of the light deals with the hue that the light emits, impacting the overall tone of the scene while also affecting how colors are represented. The angle at which light is cast relates to the direction and quality of shadows and highlights, influencing the atmosphere and depth of the composition. However, these factors do not define light intensity itself, which is specifically concerned with the quantity of light affecting the visual output on screen.