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

Task, accent, and decorative

Answer

Natural, artificial, and emergency

Answer

General, supplemental, and highlight

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

5–10 fc

Answer

75–100 fc

Answer

150–200 fc

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

Energy waste from over-illumination

Answer

Excessive glare on reflective tile surfaces

Answer

Color temperature inconsistency between lamps

Question 4

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

Accepted Answer

2700K–3000K

Answer

3500K–4000K

Answer

5000K–5700K

Answer

6500K+

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

Lamp life

Answer

Dimming compatibility

Answer

Thermal management

Question 6

In a residential setting, a lighting control that automatically adjusts light levels based on time of day to support the occupant's circadian rhythm is best described as which type of system?

Accepted Answer

Tunable white (dynamic CCT) human-centric control

Answer

Occupancy-based switching

Answer

Astronomical time-clock with scene control

Answer

Emergency transfer system