Light Without Glare

The object of this paper is to show what factors must be controlled in order to produce satisfactory illumination without glare. The relative importance of brightness of light sources, their candle power, position in the field of view and contrast with the background are discussed. The paper includes tables from the Illuminating Engineering Society Code of Industrial Lighting in which for the first time various light sources, both natural and artificial are classified from the stand-point of glare. The use of these tables is explained and illustrative examples are given.