CLD Luminaire Selection 4

Question 1

When specifying luminaires for a historically sensitive renovation, which consideration is typically prioritized alongside energy code compliance?

Accepted Answer

Maintaining the visual character and scale of original fixtures

Answer

Historic preservation projects require balancing energy code mandates with maintaining the visual integrity and character of the original lighting fixtures and space.

Question 2

A luminaire's photometric data shows a beam spread of 15°. How would this typically be classified?

Accepted Answer

Spot

Answer

A 15° beam spread is classified as a spot beam, typically used for accent lighting or highlighting small, focused areas.

Question 3

For an outdoor parking structure, which luminaire characteristic is most critical in reducing energy consumption while maintaining safety illuminance levels?

Accepted Answer

Precise photometric distribution minimizing wasted spill light

Answer

Precise optical control directs lumens exactly where needed, allowing designers to meet illuminance targets with lower wattage and fewer fixtures.

Question 4

A luminaire spec sheet lists a Power Factor (PF) of 0.95. What does this tell the electrical designer?

Accepted Answer

The luminaire draws real and reactive power with only 5% reactive component

Answer

A power factor of 0.95 means 95% of the volt-amperes drawn are converted to real working watts, with only 5% reactive power, indicating an efficient driver design.

Question 5

Which luminaire type would a CLD specify for grazing a rough stone or textured masonry wall to emphasize texture?

Accepted Answer

Narrow-beam accent luminaire mounted very close to the wall surface

Answer

Grazing places a narrow beam very close and nearly parallel to a textured surface, casting strong shadows that emphasize the surface texture and relief.

(CLD) Certified Lighting Designer Practice Test

(CLD) Certified Lighting Designer Practice Test

CLD Luminaire Selection 4