CLD Daylighting Design 2

Question 1

Which metric best quantifies the potential for glare from daylighting in a space over an entire year?

Accepted Answer

Annual Glare (AG) using Daylight Availability Profiles

Answer

Annual Glare (AG) using Daylight Availability Profiles evaluates glare risk across all occupied hours throughout the year, making it the most comprehensive annual metric.

Question 2

A south-facing clerestory window primarily delivers daylight to which area of a room?

Accepted Answer

The deeper interior zones away from the primary façade

Answer

Clerestory windows are positioned high on walls to project daylight deep into interior zones that perimeter windows cannot adequately reach.

Question 3

In climate-based daylight modeling (CBDM), which input file provides the annual hourly solar and sky data?

Accepted Answer

EnergyPlus Weather file (.epw)

Answer

The EnergyPlus Weather (.epw) file contains 8,760 hours of measured or synthesized climate data including direct normal and diffuse horizontal irradiance used in CBDM.

Question 4

What is the primary daylighting benefit of using a light shelf on a south-facing façade?

Accepted Answer

Redirecting high-angle sunlight onto the ceiling to increase depth of penetration

Answer

A light shelf reflects high-angle sunlight upward onto the ceiling, which then bounces it deeper into the room while also shading the lower glazing from direct sun.

Question 5

Useful Daylight Illuminance (UDI) defines the 'useful' range of daylight illuminance as approximately:

Accepted Answer

300–3,000 lux

Answer

UDI defines the useful range as 300–3,000 lux, where values below cause insufficient illuminance and values above risk glare or overheating.

(CLD) Certified Lighting Designer Practice Test

(CLD) Certified Lighting Designer Practice Test

CLD Daylighting Design 2