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Beam Angle and Field Angle

Sep 23
Written by Richard Renfro
The beam angle measures a source's intensity until it has fallen 50%. The field angle measures the angle of a source's intensity until it has fallen 10%.

The beam angle measures a source's intensity until it has fallen 50%. The field angle measures the angle of a source's intensity until it has fallen 10%.

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Lighting Intuition for Architects
Richard Renfro
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