July 2019
Intermediate to advanced
208 pages
6h 17m
English
Content preview from Urban Lighting for People
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Glossary
The following definitions for lighting terms are taken from BS EN 12665: 2011: Light and Lighting: Basic terms and criteria for specifying lighting requirements.1 Note that the list includes some definitions that are not used within this book, and that for some terms, an additional or alternative definition is given.
Absence factor (FA)
Factor indicating the proportion of time that a space is unoccupied
Absorptance
Ratio of the luminous flux absorbed in a body to the luminous flux incident on it
Accommodation
Adjustment of the dioptric power of the crystalline lens by which the image of an object, at a given distance, is focused on the retinaorAdjustment of the power of the lens of the eye for focusing an image of an object on the retina ...
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