IEVref:845-09-99ID:
Language:enStatus: Obsolete
Term: externally reflected component of daylight factor
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Symbol: De
Definition: ratio of that part of the illuminance at a point on a given plane in an interior which is received directly from external reflecting surfaces illuminated directly or indirectly by a sky of assumed or known luminance distribution, to the illuminance on a horizontal plane due to an unobstructed hemisphere of this sky. The contribution of direct sunlight to both illuminances is excluded

NOTE – See Note 2 to 845-09-97.


Publication date:1987
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