CLC Residential Lighting Design Flashcards

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

Answer: Ambient, task, and accent

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

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

Answer: 30–50 fc

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

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?

Answer: Downward shadows on the face that impair grooming tasks

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

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

Answer: 2700K–3000K

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

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

Answer: Illuminance uniformity across the floor plane

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

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?

Answer: Tunable white (dynamic CCT) human-centric control

Tunable white systems dynamically adjust both CCT and intensity throughout the day to align electric lighting with natural daylight cycles and circadian biology.