Which is usually the brightest light on a subject in a three-point lighting system?

In a three-point lighting system, the key light serves as the primary source of illumination for the subject, making it the brightest light in the setup. It is strategically positioned to highlight the texture and shape of the subject, creating depth and interest in the composition. The placement of the key light can dramatically define the mood and visual aesthetic by casting shadows and emphasizing facial features or important elements.

The other types of lighting used in this system have different roles: the backlight helps to create separation between the subject and the background, adding depth but typically not being as bright as the key light. The fill light softens and reduces shadows created by the key light but is also not meant to be as bright. Ambient light provides general lighting for the scene but usually lacks the focused brightness of the key light. Understanding these distinctions is essential for mastering effective lighting techniques in videography and photography.