EA: LIGHT_BEAM_SPREAD
Status:
STD 2005/06/07
Code:
569
Concept definition:
Twice the angle from the beam axis at which the intensity of a <
LIGHT
> is 10 percent of its maximum value; light beam spread. For an omni-directional light, the light beam spread is 360 arc degrees.
Attribute value type:
REAL
Unit equivalence class label:
PLANE_ANGLE
Reference type:
IR
Reference:
[
IEFE
]
Supplemental references:
Group membership:
ANGULAR_MEASURE
LIGHTING_AND_VISIBILITY
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