CLC Daylighting Integration 3

Question 1

Which fenestration strategy is most effective at controlling direct beam sunlight on east- and west-facing facades?

Accepted Answer

Vertical fins or louvers

Answer

Vertical fins are most effective on east and west facades because the sun's low lateral angles require vertical shading elements to intercept direct beam radiation.

Question 2

Annual Sunlight Exposure (ASE) is used in daylighting to measure:

Accepted Answer

The percentage of floor area receiving more than 1,000 lux of direct sunlight for more than 250 occupied hours per year

Answer

ASE quantifies the risk of glare and overheating by measuring how much of the floor area is exposed to high direct-sun illuminances for extended periods annually.

Question 3

A toplighting system using a sawtooth roof with north-facing glazing (in the Northern Hemisphere) provides:

Accepted Answer

Uniform diffuse daylight with minimal direct sun penetration

Answer

North-facing sawtooth glazing admits uniform diffuse sky light while avoiding direct sun, making it ideal for spaces requiring consistent, glare-free illumination.

Question 4

What is the recommended minimum Daylight Factor for a typical office environment according to daylighting guidelines?

Accepted Answer

2%

Answer

A Daylight Factor of approximately 2% is commonly cited as the minimum for office spaces to be considered adequately daylit under overcast sky conditions.

Question 5

Dynamic glazing (electrochromic glass) in a daylighting system primarily benefits occupants by:

Accepted Answer

Allowing real-time adjustment of tint to control glare and solar heat gain

Answer

Electrochromic glazing can be tinted on demand, letting occupants or automated controls balance view, glare control, and solar heat gain dynamically throughout the day.

(CLC) Certified Lighting Consultant Practice Test

(CLC) Certified Lighting Consultant Practice Test

CLC Daylighting Integration 3