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For Color Angular Uniformity, Luminaires V2.0 states that angular scanning resolution shall be 1° on the 0° and 90° vertical planes. If a directional luminaire (e.g., a down light) has light output only to 20°, to what angles must measurements be taken? Follow

Only the measurements within the beam angle are evaluated for color angular uniformity, where beam angle is defined as the angle in degrees, between the two opposite directions in which the average intensity is 50% of the center beam intensity as measured in at least two rotational planes, 90° from each other, around and through the beam axis.

Downlights that utilize interchangeable trims may be tested without a trim to demonstrate compliance with the color angular uniformity requirement. This applies to the color angular uniformity requirement only and does not extend to other photometric requirements.

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