DISTRIBUTION OF SKY LIGHT INCIDENT ON INTERIOR SURFACES FROM A RECTANGULAR APERTURE : Cases of CIE standard overcast sky and uniform sky

Abstract

This paper deals w 三 th the distribution of light incident from sky through a rectangular aperture on a wall or ceiling onto interior surfaces of a room with a shape of rectangular parallelepiped ． As for sky conditions ， this paper assumes CIE overcast sky and llniform sky ． This paper presents a series of equations for calculating direct illuminance at an arbitrary point on an arbitrary interior surface and ltrminous flux incident directly onto an arbitrary interior sur − face ． KeyWOizls：light distribution in interiors ， rectangular aPerture ， CIE stanclard overcast sky ， uniform sky