CLC Daylighting Integration 2

Question 1

What is the primary purpose of a light shelf in daylighting design?

Accepted Answer

To reflect sunlight deeper into a room while shading the lower window zone

Answer

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.

Question 2

Which metric best quantifies the availability of daylight in a space over an entire year?

Accepted Answer

Climate-Based Daylight Modeling (CBDM)

Answer

Climate-Based Daylight Modeling (CBDM) uses actual hourly weather data to simulate annual daylight availability, providing a more realistic picture than static metrics.

Question 3

A south-facing clerestory in the Northern Hemisphere is most effective at admitting daylight during which season?

Accepted Answer

Winter, when the sun is lowest and shines directly through

Answer

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.

Question 4

What does an Daylight Autonomy (DA) value of 65% indicate for a given sensor point?

Accepted Answer

The target illuminance is met by daylight alone for 65% of annual occupied hours

Answer

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.

Question 5

Which glazing characteristic most directly reduces solar heat gain while still allowing visible light transmission?

Accepted Answer

High Light-to-Solar Gain (LSG) ratio

Answer

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.

(CLC) Certified Lighting Consultant Practice Test

(CLC) Certified Lighting Consultant Practice Test

CLC Daylighting Integration 2