Which of the following is not a daylighting strategy described?

• A. Clerestory windows
• B. Light shelves
• C. Diffusing glazing
• D. Nighttime artificial lighting

Answer: (D)

Daylighting strategies focus on bringing and spreading natural light into a space during the day to reduce the need for electric lighting. Nighttime artificial lighting isn’t a daylighting approach because it relies on electric light after the sun has set, not on daylight usage.

Clerestory windows bring daylight in from above without sacrificing wall space, helping light reach deeper into a room. Light shelves catch daylight at higher angles and bounce it off the ceiling to distribute it further inside while reducing glare. Diffusing glazing scatters light to create a softer, more uniform illumination, improving daylight distribution and reducing harsh shadows.

So, the option that isn’t a daylighting strategy is nighttime artificial lighting.