Definition
The lumen method is an indoor lighting calculation methodology that allows a quick assessment of the number of luminaires necessary to achieve a given average illuminance level or alternatively the average illuminance level that will be achieved for a given number of luminaires. It is valid for empty rectangular rooms with simple three-surface diffuse reflectances for ceiling, wall, and floor.
Introduction
When an electric lamp is turned on, it emits light and it is possible to quantify the amount of light by measuring it, the result being given in the units of lumens. In itself this is a useful piece of information, but what would be more useful would be to have a method of converting this into a measure of the amount of light that would be received onto a desk from one or more luminaires or alternatively the number of luminaires necessary to achieve a given quantity of light on the desk. This calculation is known as the lumen method.
Light falling onto a surface is called...
References
CIE Publication 40: Calculations for interior lighting – basic method (1978)
CIE Publication 52: Calculations for interior lighting – applied method (1982)
CIE Publication 97: Guide on the maintenance of indoor electric lighting systems (2005)
ISO 8995-1:2002(E)/CIE S 008/E: 2001: lighting of work places part 1: indoor
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© 2016 Springer Science+Business Media New York
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Thorns, P. (2016). Coefficient of Utilization, Lumen Method. In: Luo, M.R. (eds) Encyclopedia of Color Science and Technology. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-8071-7_117
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