NCIDQ Interior Design Professional Exam (IDPX) Practice Exam 2025 – The Comprehensive All-in-One Guide to Exam Success!

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What aspect of a lighting design does candlepower measure?

Color temperature

Intensity of emitted light

Candlepower measures the intensity of emitted light in a specific direction. It quantifies how much light is produced by a light source in a given direction, making it an essential parameter for evaluating lighting designs. By focusing on the luminous intensity, designers can determine how effectively a light source produces brightness at various angles, which is crucial for creating well-lit spaces that meet both functional and aesthetic needs.

In contrast, the other options, such as color temperature, energy efficiency, and light color quality, relate to different properties of light sources. Color temperature indicates the appearance of light (warm vs. cool), energy efficiency refers to how much light is produced per watt of power consumed, and light color quality assesses how accurately colors appear under a specific light source, none of which are measured by candlepower.

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Energy efficiency

Light color quality

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