Physical Aspects of Light--'Seeing Parameters'. Lighting Techniques in Architecture (Madison, December 9-10, 1969).

In order to judge or design the lighting of an interior a person must be able to understand and take into account many aspects of seeing and illumination. Important areas of consideration are--(1) factors that contribute to the visibility of an object: size, brightness, contrast, and time, (2) radiant energy with regard to the visible spectrums of light, (3) visual acuity and illumination levels as they relate to dark adaptation and task performance, and (4) provisions for comfortable seeing by providing proper illumination levels and minimizing glare sources. (JD)