Classification by source hardness and size: hard (point), soft (diffuse), or hybrid — determines shadow quality and mood. Foundation of all lighting.
Light Type
The distinction between hard and soft light determines how the scene will look even before the first shot. Hard light — pinpoint, from a small source, high contrast — casts sharp, dark shadows and creates modeling through extreme differences in brightness. This is your tool for drama, suspense, film noir. A mere 575 HMI behind a Fresnel lens, directly in the face — as hard as it gets. Soft light, on the other hand — diffuse, from a large source or obtained through diffusion — spreads evenly, shadows are broad, contrast is low. The face appears flattered, the scene is calming. A large softbox, a white reflection surface, even a cloudy sky: all soft light.
Practically, it works like this: you stretch a silk (diffusing fabric) in front of your source, or you mount a reflector (white or silver) for diffusion. The larger the effective light area in relation to the distance to the character, the softer it is. This is also the geometric reality — a softbox close to the face is softer than the same box ten meters away. Hard and soft light are not absolutes, but a spectrum. With eggcrate grids or flags, you can partially break up hard light; with subtle diffusion, you can make soft light a bit more edgy again.
For image composition, this means specifically: hard light emphasizes structure, age, conflict — ideal for antagonists or turning points. Soft light creates intimacy, understanding, gentleness — love scenes, introspection. In a thriller, you work with hard key light and deep shadows; in a soap opera, with soft ring light and minimized shadow depths. Mixed forms are standard: a hard key light, modified by a soft fill or bounce. This creates readability without harshness. From the camera's perspective, this also means: hard light requires more precise focus settings and highlights sensor noise; soft light is forgiving and reduces technical flaws. In low-key setups — where shadows themselves carry the narrative — the light type is crucial: a hair light must be hard to provide contour, while the ambient can remain soft. The classification is not ornamental — it is the basis for decisions regarding the sensor, lens, and ultimately, direction.