Light falloff refers to the decrease in brightness of light as it moves away from its source. This phenomenon occurs because light spreads out over a larger area, causing the intensity to diminish. The rate of falloff can vary depending on the type of light source, such as point lights, spotlights, or area lights. In practical applications, understanding light falloff is essential for fields like photography, cinematography, and 3D rendering. It helps artists and technicians create realistic lighting effects by controlling how light interacts with objects and environments, enhancing the overall visual experience.