CLD Interior Lighting 2

Question 1

Which lighting metric best describes the human eye's perception of a surface's brightness rather than the actual light output of the fixture?

Accepted Answer

Luminance

Answer

Luminance (measured in cd/m²) quantifies the brightness perceived by the eye from a surface, accounting for how much light is reflected or emitted toward the observer.

Question 2

A hospitality designer specifies warm-white lamps at 2700K for a hotel lobby. What is the primary design intention?

Accepted Answer

Evoking warmth and relaxation

Answer

2700K is a warm CCT that mimics incandescent light, creating an intimate and welcoming ambiance suited to hospitality environments.

Question 3

In a commercial office, the Unified Glare Rating (UGR) limit recommended by IESNA for computer-based tasks is typically below:

Accepted Answer

UGR 22

Answer

IESNA and EN 12464-1 recommend UGR ≤ 19 for computer work, with many specifications targeting UGR < 22 as a practical upper limit for offices.

Question 4

A designer is layering light in a retail store. Which layer is primarily responsible for highlighting merchandise on display shelves?

Accepted Answer

Accent layer

Answer

The accent layer uses directional, higher-intensity sources to draw attention to specific objects or displays, increasing their visual prominence.

Question 5

What does the term 'scalloping' refer to in interior lighting design?

Accepted Answer

Semi-circular patterns of light on a vertical wall surface

Answer

Scalloping is the arc-shaped pattern of light projected onto a wall by recessed downlights or wall washers placed too close to the wall.

(CLD) Certified Lighting Designer Practice Test

(CLD) Certified Lighting Designer Practice Test

CLD Interior Lighting 2