CLC Lighting Design & Application 2

Question 1

Which lighting metric best describes the amount of light falling on a surface?

Accepted Answer

Illuminance (footcandles or lux)

Answer

Illuminance measures the amount of luminous flux per unit area arriving at a surface, expressed in footcandles (fc) or lux.

Question 2

A retail store wants to highlight merchandise with high contrast. Which technique is most appropriate?

Accepted Answer

Accent lighting with a 3:1 to 5:1 accent-to-ambient ratio

Answer

Accent lighting using a 3:1 to 5:1 ratio creates the focal contrast needed to draw attention to merchandise without causing glare.

Question 3

What is the primary purpose of a photometric plan in a lighting design project?

Accepted Answer

To predict light levels and distribution across a space

Answer

A photometric plan uses calculations or software to predict illuminance levels, uniformity, and distribution before installation.

Question 4

In museum lighting, which UV threshold is commonly recommended to protect artifacts from photochemical damage?

Accepted Answer

10 µW/lm

Answer

Museum conservation standards typically call for UV levels at or below 10 µW/lm to minimize photochemical degradation of sensitive materials.

Question 5

Which of the following best defines 'luminaire efficiency'?

Accepted Answer

The ratio of lumens exiting the luminaire to the total lumens produced by the lamp(s) inside

Answer

Luminaire efficiency (or light output ratio) is the fraction of lamp lumens that actually exits the fixture after losses from optics, housing, and thermal effects.

(CLC) Certified Lighting Consultant Practice Test

(CLC) Certified Lighting Consultant Practice Test

CLC Lighting Design & Application 2