Daylighting Integration Flashcards
7 cards from real CLC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Daylighting Integration flashcards as text
What is the primary purpose of a light shelf in daylighting design?
Answer: To reflect sunlight deeper into a room while shading the lower window zone
A light shelf reflects sunlight onto the ceiling and deeper into the space while the shelf itself shades the lower portion of the window, reducing glare.
Which metric best quantifies the availability of daylight in a space over an entire year?
Answer: Climate-Based Daylight Modeling (CBDM)
Climate-Based Daylight Modeling (CBDM) uses actual hourly weather data to simulate annual daylight availability, providing a more realistic picture than static metrics.
A south-facing clerestory in the Northern Hemisphere is most effective at admitting daylight during which season?
Answer: Winter, when the sun is lowest and shines directly through
South-facing clerestories in the Northern Hemisphere receive the most direct sunlight in winter when the sun's altitude is low, making them most effective then.
What does an Daylight Autonomy (DA) value of 65% indicate for a given sensor point?
Answer: The target illuminance is met by daylight alone for 65% of annual occupied hours
Daylight Autonomy (DA) is the percentage of occupied hours during a year when a target illuminance threshold is met solely by daylight at a specific point.
Which glazing characteristic most directly reduces solar heat gain while still allowing visible light transmission?
Answer: High Light-to-Solar Gain (LSG) ratio
A high LSG ratio means the glazing transmits a greater proportion of visible light relative to total solar heat gain, improving daylighting while controlling heat.
In daylighting design, 'borrowed light' refers to:
Answer: Daylight transferred from a perimeter zone to an interior zone through interior glazing or openings
Borrowed light is daylight that passes from a daylit perimeter zone into an interior zone via interior windows, sidelights, or clerestories within the building.
The CIE overcast sky model assumes luminance is distributed how across the sky dome?
Answer: Brightest at the zenith, with luminance decreasing toward the horizon by a factor of about 3
The CIE Standard Overcast Sky has a zenith that is approximately three times brighter than the horizon, creating a gradient used in Daylight Factor calculations.