LEED Green Associate Practice Test

What does light trespass refer to?

1. The amount of light absorbed by a surface

2. The spillage of light across a project boundary

3. The effective use of light sources indoors

4. The brightness of light fixtures at night

The correct answer is: The spillage of light across a project boundary

Light trespass refers to the unintended spillage of light beyond the intended boundaries of a property, such as light spilling into adjacent properties or areas not meant to be illuminated. This concept is particularly significant in discussions about minimizing light pollution and creating respectful transitions between different lighting environments, especially in residential areas. Effective management and design of outdoor lighting can help mitigate light trespass, making B the correct choice. While other options touch on various aspects of lighting, they do not accurately capture the definition of light trespass. The absorption of light by surfaces, effective uses of indoor lighting, and the brightness of fixtures at night are all relevant to the broader topic of lighting design but do not specifically address the phenomenon of light crossing property lines inappropriately.