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Measurement of Circadian Effectiveness in Lighting for Office Applications

Babilon, Sebastian ; Beck, Sebastian ; Kunkel, Julian ; Klabes, Julian ; Myland, Paul ; Benkner, Simon ; Khanh, Tran Quoc (2022)
Measurement of Circadian Effectiveness in Lighting for Office Applications.
In: Applied Sciences, 2022, 11 (15)
doi: 10.26083/tuprints-00021234
Article, Secondary publication, Publisher's Version

Abstract

Featured Application: In-field spatially resolved light measurements for the characterization of non-visual effects and proper prediction of the circadian effectiveness for human-centric lighting design.

Abstract: As one factor among others, circadian effectiveness depends on the spatial light distribution of the prevalent lighting conditions. In a typical office context focusing on computer work, the light that is experienced by the office workers is usually composed of a direct component emitted by the room luminaires and the computer monitors as well as by an indirect component reflected from the walls, surfaces, and ceiling. Due to this multi-directional light pattern, spatially resolved light measurements are required for an adequate prediction of non-visual light-induced effects. In this work, we therefore propose a novel methodological framework for spatially resolved light measurements that allows for an estimate of the circadian effectiveness of a lighting situation for variable field of view (FOV) definitions. Results of exemplary in-field office light measurements are reported and compared to those obtained from standard spectral radiometry to validate the accuracy of the proposed approach. The corresponding relative error is found to be of the order of 3–6%, which denotes an acceptable range for most practical applications. In addition, the impact of different FOVs as well as non-zero measurement angles will be investigated.

Item Type: Article
Erschienen: 2022
Creators: Babilon, Sebastian ; Beck, Sebastian ; Kunkel, Julian ; Klabes, Julian ; Myland, Paul ; Benkner, Simon ; Khanh, Tran Quoc
Type of entry: Secondary publication
Title: Measurement of Circadian Effectiveness in Lighting for Office Applications
Language: English
Date: 2022
Year of primary publication: 2022
Publisher: MDPI
Journal or Publication Title: Applied Sciences
Volume of the journal: 11
Issue Number: 15
Collation: 19 Seiten
DOI: 10.26083/tuprints-00021234
URL / URN: https://tuprints.ulb.tu-darmstadt.de/21234
Corresponding Links:
Origin: Secondary publication via sponsored Golden Open Access
Abstract:

Featured Application: In-field spatially resolved light measurements for the characterization of non-visual effects and proper prediction of the circadian effectiveness for human-centric lighting design.

Abstract: As one factor among others, circadian effectiveness depends on the spatial light distribution of the prevalent lighting conditions. In a typical office context focusing on computer work, the light that is experienced by the office workers is usually composed of a direct component emitted by the room luminaires and the computer monitors as well as by an indirect component reflected from the walls, surfaces, and ceiling. Due to this multi-directional light pattern, spatially resolved light measurements are required for an adequate prediction of non-visual light-induced effects. In this work, we therefore propose a novel methodological framework for spatially resolved light measurements that allows for an estimate of the circadian effectiveness of a lighting situation for variable field of view (FOV) definitions. Results of exemplary in-field office light measurements are reported and compared to those obtained from standard spectral radiometry to validate the accuracy of the proposed approach. The corresponding relative error is found to be of the order of 3–6%, which denotes an acceptable range for most practical applications. In addition, the impact of different FOVs as well as non-zero measurement angles will be investigated.

Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-212341
Additional Information:

This article belongs to the Special Issue Advances in Human-Centric Lighting

Data Availability Statement: All data generated or analyzed to support the findings of the present study are included this article. The raw data can be obtained from the authors, upon reasonable request.

Keywords: circadian effectiveness; circadian stimulus; spatially resolved light measurements; office lighting; non-visual effects; human-centric lighting design

Classification DDC: 600 Technology, medicine, applied sciences > 600 Technology
Divisions: 15 Department of Architecture
15 Department of Architecture > Fachgruppe F: Gebäudetechnik > Entwerfen und Gebäudetechnologie
15 Department of Architecture > Fachgruppe F: Gebäudetechnik
18 Department of Electrical Engineering and Information Technology
18 Department of Electrical Engineering and Information Technology > Adaptive Lighting Systems and Visual Processing
Date Deposited: 06 May 2022 11:43
Last Modified: 09 May 2022 07:08
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