Spotlight distribution casts a focused beam of light like a flashlight, a follow spot in a theater, or a headlight. The light's beam angle controls the main strength of the beam, and the field angle controls the “spill” of light outside the main beam.
Note: With the scanline renderer, the beam casts light at full intensity, and the field angle limits the area where the beam is cast.
Spotlight distribution
Viewport representation of a Target light with spotlight distribution
Spotlight settings appear on the Distribution (Spotlight) rollout.