CLC CLC Residential Lighting Design 2

Question 1

Which Title 24 requirement in California most directly affects residential lighting fixture selection?

Accepted Answer

Minimum efficacy requirements and high-efficacy lamp mandates for most fixtures

Answer

California Title 24 mandates high-efficacy lamps (typically LED) in the majority of residential luminaires to meet energy efficiency standards.

Question 2

A residential client complains that their dimmed LED downlights flicker noticeably. The most likely cause is which compatibility issue?

Accepted Answer

Mismatch between the LED driver and the legacy phase-cut (TRIAC) dimmer switch

Answer

TRIAC/phase-cut dimmers designed for incandescent loads often conflict with LED drivers, causing flicker, buzzing, or dropout at low levels.

Question 3

For residential stairway lighting, which design principle is most critical for safety?

Accepted Answer

Eliminating shadows on tread nosings and maintaining adequate illuminance on all steps

Answer

Stairway lighting must clearly reveal tread edges (nosings) and maintain uniform illuminance to prevent missteps and falls.

Question 4

Which mounting type is typically used for residential under-cabinet kitchen lighting to provide task illumination on countertops?

Accepted Answer

Linear LED strip or puck lights mounted at the cabinet's front edge

Answer

Under-cabinet linear LED strips or puck lights installed near the front edge of wall cabinets cast light directly onto the countertop with minimal shadow.

Question 5

In residential bedroom design, which lighting strategy is recommended to minimize blue-light exposure before sleep?

Accepted Answer

Dimming to low levels with warm (2700K or below) CCT in the evening

Answer

Dimmed, warm-CCT light in the hours before sleep reduces circadian-disrupting blue-light exposure, supporting melatonin production.

(CLC) Certified Lighting Consultant Practice Test

(CLC) Certified Lighting Consultant Practice Test

CLC CLC Residential Lighting Design 2