[10.5.2.4.1]
Visible radiation from the sun and sky reflected by exterior surfaces that lie below the plane of the horizon.
NOTE: This definition was changed in ANSI/IES RP-16-17 Addendum 2.
« Back to Definitions Index[10.5.2.4.1]
Visible radiation from the sun and sky reflected by exterior surfaces that lie below the plane of the horizon.
NOTE: This definition was changed in ANSI/IES RP-16-17 Addendum 2.
« Back to Definitions IndexIlluminating Engineering Society
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