A project owner is concerned about the safety of building occupants during the e

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试卷: LEED v4 GA模拟题A卷[查看]
A project owner is concerned about the safety of building occupants during the evening hours as they walk to the parking lot. What exterior lighting strategy would ensure occupant safety, prevent light pollution, and conserve energy?
A: Use shielded LED fixtures that are on 24 hours day
B: Strategically place lighting to shine into the roads surrounding the property
C: Installing timers that shut off the lights after hours
D: Install up-lighting in the parking lot

参考答案: C

本题解释:
C:Timers that shut off the lights after the building is closed would achieve all three goals.

A:Lights that are on 24 hours per day do not conserve energy, even if they are LEDs.
B:This is an example of light trespass, which is trying to be avoided.
D:Up-lighting is to be avoided for light pollution.
Notes:
Light pollution is ’waste light from building sites that produces glare, is directed upward to the sky, or is directed off the site. Waste light does not increase nighttime safety, utility, or security and needlessly consumes energy.’ - USGBC
Light pollution also negatively impacts animals that are nocturnal. There are several strategies to reduce light trespass from a site:
Design to prevent avoid over-lighting
Avoid up-lighting
Reduce glare
Direct full cutoff fixtures downward
Reduce the contrast between light and dark areas
Use shielded fixtures