In the context of lighting, diffuse most closely means:

• A. To concentrate light in a narrow beam
• B. To reflect light off a surface
• C. To glow softly in one spot
• D. To spread light evenly to reduce glare

Answer: (D)

Diffused lighting describes light that is scattered in many directions, creating a soft, even illumination with reduced harsh shadows. This distribution helps minimize glare and makes spaces feel more comfortable to look at. That’s why spreading light evenly to reduce glare is the best match.

Concentrating light in a narrow beam would create bright hotspots rather than an even wash of light. Reflecting light off a surface describes how light bounces, which can produce different effects depending on the surface, but it doesn’t define diffusion itself. Glowing softly in one spot describes a localized light rather than an even spread.