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What is the science, theory, or method of providing illumination through the use of light of day?

• counterlight

• daylighting

• Roge

• skylight

What is the measure of daylight illuminance expressed as the ratio of daylight illumination at a point on a given plane to the simultaneously measured illuminance on a horizontal plane from an unobstructed sky of assumed or known luminance distribution?

• daylight factor method

• clear sky

• crosslight

• zenith

What is the CIE standard for a reference sky condition having a luminance distribution three times brighter near the zenith than at the horizon?

• clear sky

• overcast sky

• artificial sky

• cloudy sky

What is the Illuminating Engineering Society devoted to?

• daylight factor

• IES

• CIE

• heliodon

What is a device used for orienting an architectural model to a light source representing the sun, calibrated with respect to latitude, time of day, and season of the year?

• heliodon

• sunlight

• ground light

• internal reflected component