Abstract
For an observer the normal direction of viewing of the other occupants of a space is commonly at 90° to the downward vertical and may vary in azimuth over 360°. The light flow from overhead lighting installations intersects this plane of viewing at 90° whereas that from side lighting is parallel to the plane of viewing. A system of modelling indicators is introduced which takes into account these relationships and is offered as a means of studying combined artificial and daylight lighting systems. The point is made that a specification system for modelling simple enough for practical use cannot be completely comprehensive and give a guaranteed appearance. For this reason the concept of the modelling indicator is introduced and stipulated to give an indication of the type and variety of modelling to be expected.
Get full access to this article
View all access options for this article.