LLC Landscape Lighting Design & Placement 5

Question 1

What is the recommended maximum voltage drop allowed at the furthest fixture on a low-voltage landscape lighting run?

Accepted Answer

10%

Answer

Industry standard allows up to 10% voltage drop at the last fixture to ensure acceptable light output and lamp longevity across the run.

Question 2

A client complains that their landscape lighting creates unwanted glare visible from the street. What design adjustment is most effective?

Accepted Answer

Reposition or shield fixtures to block direct lamp view from the street

Answer

Repositioning or adding glare shields prevents the lamp or LED source from being visible from off-property viewing angles, eliminating glare.

Question 3

When lighting a garden bed with multiple plant heights, which approach best prevents taller plants from shadowing shorter ones?

Accepted Answer

Position individual accent fixtures for each height layer from different angles

Answer

Layering individual accent fixtures at different positions ensures each height tier receives direct illumination regardless of what surrounds it.

Question 4

What is the principal advantage of using a transformer with a built-in timer and astronomical clock for landscape lighting?

Accepted Answer

It automatically adjusts on/off times year-round based on local sunset and sunrise

Answer

An astronomical clock calculates local sunrise and sunset daily, automatically shifting on/off times without manual seasonal adjustment.

Question 5

A designer chooses to use RGBW LED fixtures in a landscape project. What unique design capability does this provide?

Accepted Answer

The ability to produce tunable white and full-color lighting from a single fixture

Answer

RGBW fixtures combine red, green, blue, and white channels, allowing both full-color dynamic effects and clean white-light output from one fixture.

(LLC) Landscape Lighting Certification Practice Test