Which statement about daylighting is true?

• A. Daylighting increases energy use
• B. Daylighting is the practice of illuminating interiors with natural light to reduce artificial lighting needs.
• C. Daylighting has no impact on energy
• D. Daylighting only concerns the color of walls

Answer: (B)

Daylighting is the practice of illuminating interiors with natural light to reduce artificial lighting needs. When spaces are designed to bring in daylight effectively, electric lighting can be used less, which lowers overall energy consumption and can improve occupants’ comfort and well-being. Achieving good daylighting involves factors like window size and placement, orientation to the sun, skylights or clerestory openings, reflective interior surfaces, and shading or controls that prevent glare and overheating. Daylighting controls, such as sensors and dimming, help ensure artificial lighting only runs when needed. The energy impact depends on climate and design, but properly implemented daylighting reduces energy use, and it isn’t just about wall color or having no effect on energy.