CBD CBD Lighting Design & Electrical Planning

Question 1

What is the primary purpose of task lighting in a bathroom design?

Accepted Answer

To provide focused light for specific activities like grooming

Answer

To illuminate the entire room evenly

Answer

To create mood and ambiance

Answer

To highlight architectural features

Question 2

Which color temperature (in Kelvin) is most recommended for bathroom vanity lighting to provide true color rendering for grooming tasks?

Accepted Answer

3000K–3500K (neutral white)

Answer

2700K (warm white)

Answer

4000K–4500K (cool white)

Answer

6500K (daylight)

Question 3

In bathroom electrical planning, what is the minimum distance a GFCI-protected outlet must be from a bathtub or shower per the NEC?

Accepted Answer

3 feet

Answer

1 foot

Answer

2 feet

Answer

6 feet

Question 4

Which type of lighting fixture is best positioned at eye level on either side of a bathroom mirror to minimize facial shadows?

Accepted Answer

Vertical side-mount sconces

Answer

Recessed downlights

Answer

A single overhead bar light

Answer

Pendant lights hung from the ceiling

Question 5

What does the IP (Ingress Protection) rating indicate on a bathroom light fixture?

Accepted Answer

The level of protection against moisture and dust intrusion

Answer

The fixture's wattage capacity

Answer

The color rendering index of the lamp

Answer

The fixture's dimmability rating

Question 6

When designing layered bathroom lighting, which three layers are considered essential?

Accepted Answer

Ambient, task, and accent lighting

Answer

Decorative, emergency, and security lighting

Answer

Natural, artificial, and supplemental lighting

Answer

Direct, indirect, and diffused lighting