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Proceedings Paper

Energy efficient lighting for the biological clock
Author(s): Dieter Lang
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Paper Abstract

Unexpectedly the existence of a formerly unknown type of photoreceptor in the human eye has been proven about 10 years ago. Primarily sensitive in the blue spectral range it is responsible for transducing light signals directly into the brain, controlling essential biological functions like setting of the circadian clock or daytime activation. Recent scientific research has enabled beneficial applications. The paradigms for good lighting design are shifting and standardization activities have been started to build up a sound base for description and application of biologically effective lighting. Latest improvements of LED technology are now allowing realizeation of advanced lighting solutions based on SSL. Optimization of biological effects is possible while demands on good vision are maintained. As biologically effective lighting is addressing a second system besides vision in the human body a measure beyond lumen per watt is required for a proper description of energy efficiency.

Paper Details

Date Published: 9 February 2011
PDF: 12 pages
Proc. SPIE 7954, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XV, 795402 (9 February 2011); doi: 10.1117/12.875323
Show Author Affiliations
Dieter Lang, OSRAM GmbH (Germany)


Published in SPIE Proceedings Vol. 7954:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XV
Klaus P. Streubel; Heonsu Jeon; Li-Wei Tu; Norbert Linder, Editor(s)

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