CLC CLC Residential Lighting Design

Question 1

The layered lighting approach in residential design combines which three primary layers?

Accepted Answer

Ambient, task, and accent

Answer

The three-layer approach (ambient, task, accent) provides flexibility and visual interest by serving different functional and aesthetic needs simultaneously.

Question 2

For residential kitchen countertop task lighting, the IES Handbook recommends a maintained horizontal illuminance of approximately how many foot-candles?

Accepted Answer

30–50 fc

Answer

IES recommends 30–50 fc maintained on kitchen countertops to support safe food preparation and detail work.

Question 3

In residential bathroom design, luminaires flanking a vanity mirror on both sides are preferred over a single overhead fixture primarily because they eliminate which issue?

Accepted Answer

Downward shadows on the face that impair grooming tasks

Answer

Side-mounted vanity lighting at eye level eliminates unflattering downward shadows on the face, improving visibility for grooming and makeup application.

Question 4

Which lamp CCT range is most commonly recommended for warm, inviting residential living spaces in US homes?

Accepted Answer

2700K–3000K

Answer

The 2700K–3000K range produces warm white light that complements wood tones and skin tones, creating a comfortable residential atmosphere.

Question 5

When specifying recessed downlights in a residential ceiling, the spacing-to-mounting-height (S/MH) ratio is used to ensure adequate what?

Accepted Answer

Illuminance uniformity across the floor plane

Answer

The S/MH ratio guides fixture spacing to achieve even light distribution, preventing bright spots under fixtures and dark areas between them.

(CLC) Certified Lighting Consultant Practice Test

(CLC) Certified Lighting Consultant Practice Test

CLC CLC Residential Lighting Design