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US Green Building Council LEED-AP-BD+C Exam - Topic 9 Question 14 Discussion

To achieve the Sustainable Sites Credit, Light Pollution Reduction, Option 1. BUG Rating Method, projects must demonstrate:
D) All luminaires meet acceptable fixture ratings for the project's Model Lighting Ordinance (MLO) lighting zone
A) All luminaires have full cutoff fixtures
B) All luminaires are mounted at least three mounting heights from the lighting boundary
C) All luminaires have a minimum color temperature of 3500 K

US Green Building Council LEED-AP-BD+C Exam - Topic 9 Question 14 Discussion

Actual exam question for US Green Building Council's LEED-AP-BD+C exam
Question #: 14
Topic #: 9
[All LEED-AP-BD+C Questions]

To achieve the Sustainable Sites Credit, Light Pollution Reduction, Option 1. BUG Rating Method, projects must demonstrate:

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Suggested Answer: D

Detailed

Under the BUG Rating Method, all luminaires must meet acceptable fixture ratings (Backlight, Uplight, and Glare ratings) for the project's Model Lighting Ordinance (MLO) lighting zone. This ensures compliance with LEED's Light Pollution Reduction credit by limiting light trespass, reducing glare, and preserving night sky quality.


by Theresia at May 04, 2025, 03:06 PM

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Dorethea
8 months ago
Wait, does that mean we can't use any decorative lights?
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Elza
9 months ago
Totally agree, it's crucial for reducing light pollution.
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Gayla
9 months ago
All luminaires need to be full cutoff fixtures!
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Wei
9 months ago
Yes, and they must follow the Model Lighting Ordinance too!
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Ollie
9 months ago
I thought 3500 K was too warm for outdoor lighting?
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Alisha
9 months ago
I think the Model Lighting Ordinance is crucial, but I’m not clear on whether it’s about fixture ratings or something else entirely.
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Mona
10 months ago
I feel like the color temperature is a factor, but I can't remember if 3500 K is the minimum or if it was higher.
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Deandrea
10 months ago
I remember something about mounting heights being important, but I can't recall if it's specifically three heights or if that was for a different credit.
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Chanel
10 months ago
I think it's about ensuring that the fixtures don't emit too much light upwards, but I'm not sure if it's all about full cutoff fixtures or something else.
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Lettie
10 months ago
I think the best approach here is to focus on the fixture ratings for the MLO lighting zone. That seems to be the most important requirement, so I'm going to select option D and move on to the next question.
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Valentin
11 months ago
Wait, I'm confused. Is it just about the color temperature, or do we need to consider the mounting height and fixture ratings too? This question is kind of tricky, I'm going to have to think it through carefully.
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Emelda
11 months ago
Okay, I've got this. The key is that the luminaires need to meet the acceptable fixture ratings for the project's MLO lighting zone. That's the right answer, I'm confident about that.
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James
11 months ago
Ugh, I'm not sure about this one. Do we need to make sure all the luminaires have full cutoff fixtures, or is that just one of the options? I'll have to re-read this a few times to make sure I understand.
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Lauran
11 months ago
Hmm, this seems pretty straightforward. I think I'll go with option D - the luminaires need to meet the acceptable fixture ratings for the project's MLO lighting zone.
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Nadine
1 year ago
I believe the correct answer is D as well, it aligns with the requirements for the Sustainable Sites Credit.
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Berry
1 year ago
I'm not sure, but I think A could also be a possibility.
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Marla
1 year ago
I agree with Celeste, D makes sense because it mentions the Model Lighting Ordinance.
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Celeste
1 year ago
I think the answer is D.
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Joana
1 year ago
I believe the correct answer is D as well, it's important to meet the fixture ratings for the project's lighting zone.
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Donette
1 year ago
I'm not sure, but I think A could also be a possibility.
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Virgilio
1 year ago
I agree with Bette, D makes sense because it ensures the luminaires meet the necessary standards.
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Lorean
1 year ago
A) All luminaires have full cutoff fixtures. Ah, the old 'full cutoff' requirement. Gotta love those lighting professionals and their obsession with light pollution.
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Carlee
1 year ago
I wonder if the 'Model Lighting Ordinance' was written by a bunch of astronomers who just want to keep the night sky clear for their stargazing.
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Chantell
1 year ago
C) All luminaires have a minimum color temperature of 3500 K
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Shakira
1 year ago
B) All luminaires are mounted at least three mounting heights from the lighting boundary
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Ethan
1 year ago
A) All luminaires have full cutoff fixtures
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Bette
1 year ago
I think the answer is D.
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Tonette
1 year ago
Wait, is the 'BUG' rating method referring to the actual bugs attracted to the lights? Because that would be a whole other level of sustainable design.
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Brandee
1 year ago
C) All luminaires have a minimum color temperature of 3500 K
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Chandra
1 year ago
B) All luminaires are mounted at least three mounting heights from the lighting boundary
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Fairy
1 year ago
A) All luminaires have full cutoff fixtures
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Dianne
1 year ago
D) All luminaires meet acceptable fixture ratings for the project's Model Lighting Ordinance (MLO) lighting zone. This makes the most sense to me, as meeting the local lighting regulations is crucial for compliance.
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Juan
1 year ago
C) All luminaires have a minimum color temperature of 3500 K
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Gearldine
1 year ago
B) All luminaires are mounted at least three mounting heights from the lighting boundary
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Francisca
1 year ago
A) All luminaires have full cutoff fixtures
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