CLC Outdoor & Landscape Lighting 3

Question 1

What is 'light trespass' in the context of outdoor and landscape lighting?

Accepted Answer

Unwanted light spilling onto neighboring properties or the night sky

Answer

Light trespass occurs when artificial light falls beyond the intended target area onto neighboring properties, roadways, or upward into the sky.

Question 2

When designing path lighting, what is the recommended maximum spacing-to-mounting-height ratio to ensure even illumination without dark spots?

Accepted Answer

4:1

Answer

A maximum spacing-to-mounting-height ratio of 4:1 is commonly recommended to maintain uniform illumination along pathways.

Question 3

Which outdoor lighting technique is best used to make a sculpture or focal plant 'pop' against a dark background?

Accepted Answer

Silhouetting

Answer

Silhouetting places the light source behind the object aimed at the background, creating a dark outline of the subject against a lit backdrop.

Question 4

For outdoor LED fixtures used in landscape applications, what minimum CRI is generally specified to render plant colors accurately?

Accepted Answer

CRI 80

Answer

A CRI of 80 or above is generally specified for landscape LED fixtures to ensure accurate and appealing color rendering of foliage and hardscape.

Question 5

A landscape designer wants to highlight a water feature at night without creating glare for seated guests nearby. Which fixture placement is most appropriate?

Accepted Answer

Submerge fixtures inside the water feature aimed upward

Answer

Submerged underwater fixtures aimed upward illuminate water features from within while keeping the light source hidden below the water surface, eliminating direct glare.

(CLC) Certified Lighting Consultant Practice Test

(CLC) Certified Lighting Consultant Practice Test

CLC Outdoor & Landscape Lighting 3