Which type of light is a baked-only light emitting 180 degrees from a surface?

• A. Spotlight
• B. Area Light
• C. Point Light
• D. Directional Light

Answer: (B)

Area lights emit light from a surface, distributing it across the area and into the space in front of that surface. This means the light radiates into a hemisphere (about 180 degrees) on one side of the emitting surface, rather than from a single point or along a single direction. In Unity, such lights are commonly used with baked lighting, contributing to lightmaps for static geometry without real-time calculation. The other types behave differently: a spotlight casts light in a cone, a point light radiates in all directions from a point, and a directional light sends parallel rays in one direction. So an area light fits the description of a baked-only light that emits 180 degrees from a surface.