Under conditions of an overcast sky, light shelves cannot increase the lighting level. They operate most effectively in sunlight. In this context ceilings are designed to be higher than normal for best operation.
Some degree of control is possible by modifying the angle of the light shelf; either internally or externally in combination. Problems with low-angle winter sunlight penetration can give rise to glare. Difficulties can be experienced in cleaning light shelves, especially the external type.
Related category• LIGHTING TOPICS
Home • About • Copyright © The Worlds of David Darling • Encyclopedia of Science • Contact