Which factor is not typically a focus when optimizing daylight in building design?

• A. Daylight distribution
• B. Glare
• C. Lighting energy needs
• D. Exterior color of the building

Answer: (D)

Daylight optimization aims to make natural light inside a building effective for illumination while keeping occupants comfortable. The key focus is how daylight is distributed so it reaches most spaces evenly, how to prevent or reduce glare from bright sun or high-contrast lighting, and how to lower artificial lighting needs through daylight harvesting strategies. Exterior color of the building doesn’t directly influence these daylighting goals. While the building’s color can affect heat gain and aesthetics, it doesn’t determine how daylight enters, spreads, or how much electrical lighting is required. The interior design choices—window placement, shading, interior surface reflectance, and daylighting controls—drive daylight performance much more than exterior color.