CIDQ IDFX Exam - Topic 2 Question 10 Discussion

Actual exam question for CIDQ's IDFX exam

Question #: 10
Topic #: 2

[All IDFX Questions]

What is the MOST efficient way to distribute balanced daylight and diffused light with minimal glare throughout the changing seasons?

ASkylights

BLight pipes

CSide lights

DClerestories

Show Suggested Answer

Suggested Answer: A

Distributing balanced daylight with minimal glare throughout the changing seasons requires a strategy that accounts for the sun's varying angles. Skylights are the most efficient option because they can be designed with diffusing glazing or shading devices to spread light evenly and reduce glare, while their placement on the roof allows them to capture daylight consistently across seasons. Light pipes (Option B) are effective for bringing light into interior spaces but are less efficient for large-scale distribution and glare control. Side lights (Option C) are windows on vertical walls, which can cause glare and are less effective as the sun's angle changes. Clerestories (Option D) are high windows that provide good daylight but are less versatile than skylights for consistent, season-long performance.

Verified Answer from Official Source:

The correct answer is verified using NCIDQ IDFX content on daylighting strategies.

Exact Extract: The NCIDQ IDFX Reference Manual states, ''Skylights, when designed with diffusing glazing, provide the most efficient way to distribute balanced daylight with minimal glare across seasons.''

Objectives:

Apply daylighting strategies for sustainable design (IDFX Objective: Human Behavior and the Designed Environment).

Understand the impact of glazing and fenestration on light distribution (IDFX Objective: Building Systems and Technology).

NCIDQ IDFX Reference Manual (Section on Daylighting).

IESNA Lighting Handbook (Daylighting Strategies).

by Jonelle at Jul 31, 2025, 08:33 PM

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Brynn

2 months ago

Side lights can create glare if not positioned right.

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Ronnie

2 months ago

Clerestories can really brighten up a space!

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Lavera

2 months ago

Really? I’ve never heard of light pipes before.

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Long

2 months ago

I think light pipes are more efficient, though.

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Shizue

3 months ago

Skylights are great for natural light!

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Charlesetta

3 months ago

Clerestories were mentioned as a way to bring in diffused light, but I wonder if they really provide balanced daylight all year round.

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Freeman

3 months ago

Side lights seem like they might work, but I feel like they could create uneven lighting depending on the time of year.

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Natalie

4 months ago

I think light pipes could be a good option since they direct light without much glare, but I can't recall the specifics.

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Denny

4 months ago

I remember we discussed skylights in class, but I'm not sure if they're the best for minimizing glare throughout the seasons.

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Elza

4 months ago

Light pipes seem intriguing, but I'm not sure how they would perform compared to skylights or clerestories. I'll need to look into the pros and cons of that approach.

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Lonny

4 months ago

Clerestories could be a good option. They allow for indirect, diffused light while also providing some direct daylight. Plus, they can be adjusted for the changing seasons.

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Taryn

4 months ago

I'm a bit confused by the wording of the question. What exactly do they mean by "balanced daylight and diffused light"? I'll need to research that a bit more.

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Geoffrey

5 months ago

Skylights seem like the obvious choice to me. They provide direct daylight and can be designed to minimize glare. The other options seem less efficient.

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