Device determines lighting requirements

An optical system for determining the lighting requirements of any seeing task was introduced recently to lighting engineers, designers, architects, and ophthalmologists, at the first of a series of regional conferences conducted by the Illuminating Engineering Society (IES). The new technique, described at the Dearborn, Mich., symposium, indicates the need for increases in the recommended lighting levels for a broad variety of standardized lighting classifications. It is the result of an 8-year study conducted at the Vision Research Laboratories of the University of Michigan, Ann Arbor, Mich., and supported by the Illuminating Engineering Researcn Institute, an independent research body of the IES.