Sky-like interior light settings: a preference study
This paper explores human observer preferences for various sky-like interior lighting scenarios realized by a combination of a blue-enriched indirect uplight component with a correlated color temperature (CCT) of 6,500 K up to 30,000 K and a 4,000 K or 5,500 K direct downlight component. Variations...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-08-01
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| Series: | Frontiers in Built Environment |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/fbuil.2023.1101534/full |
| _version_ | 1797767533708705792 |
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| author | Stefan Klir Sebastian Babilon Sebastian Babilon Paul Myland Simon Benkner Tran Quoc Khanh |
| author_facet | Stefan Klir Sebastian Babilon Sebastian Babilon Paul Myland Simon Benkner Tran Quoc Khanh |
| author_sort | Stefan Klir |
| collection | DOAJ |
| description | This paper explores human observer preferences for various sky-like interior lighting scenarios realized by a combination of a blue-enriched indirect uplight component with a correlated color temperature (CCT) of 6,500 K up to 30,000 K and a 4,000 K or 5,500 K direct downlight component. Variations in the natural sky were mimicked by the indirect uplight component reflected from the ceiling of the experimental room. The settings for the direct lighting component, on the other hand, were selected based on the reported outcomes of previous preference studies in the field of interior lighting. The resulting lighting conditions were evaluated by a total of 29 observers, from which subjective ratings of brightness, sky-likeness, satisfaction, pleasantness, and general appeal were collected in an office workplace environment. In this experimental setting, the most preferred lighting conditions exhibited a direct-to-indirect lighting ratio of 50:50 with a CCT of 4,000 K in the direct component and 6,500, 7,500, and 9,000 K in the indirect component. For all examined combinations, none was rated as truly sky-like. Nonetheless, the study results showed that only the combination of a warmer CCT in the direct component and a cooler, blue-enriched CCT in the indirect lighting component leads to a maximum in the subjects’ preference ratings. In summary, the subjects preferred light settings with a white appearance on the work surface without any intense or noticeable blue cast or tint. |
| first_indexed | 2024-03-12T20:40:16Z |
| format | Article |
| id | doaj.art-8383a35fce63410b802a4082ae1fccf4 |
| institution | Directory Open Access Journal |
| issn | 2297-3362 |
| language | English |
| last_indexed | 2024-03-12T20:40:16Z |
| publishDate | 2023-08-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Built Environment |
| spelling | doaj.art-8383a35fce63410b802a4082ae1fccf42023-08-01T10:46:34ZengFrontiers Media S.A.Frontiers in Built Environment2297-33622023-08-01910.3389/fbuil.2023.11015341101534Sky-like interior light settings: a preference studyStefan Klir0Sebastian Babilon1Sebastian Babilon2Paul Myland3Simon Benkner4Tran Quoc Khanh5Laboratory of Adaptive Lighting Systems and Visual Processing, Technical University of Darmstadt, Darmstadt, GermanyLaboratory of Adaptive Lighting Systems and Visual Processing, Technical University of Darmstadt, Darmstadt, GermanyArnold and Richter Cine Technik GmbH & Co., Betriebs KG, Stephanskirchen, GermanyLaboratory of Adaptive Lighting Systems and Visual Processing, Technical University of Darmstadt, Darmstadt, GermanyLaboratory of Adaptive Lighting Systems and Visual Processing, Technical University of Darmstadt, Darmstadt, GermanyLaboratory of Adaptive Lighting Systems and Visual Processing, Technical University of Darmstadt, Darmstadt, GermanyThis paper explores human observer preferences for various sky-like interior lighting scenarios realized by a combination of a blue-enriched indirect uplight component with a correlated color temperature (CCT) of 6,500 K up to 30,000 K and a 4,000 K or 5,500 K direct downlight component. Variations in the natural sky were mimicked by the indirect uplight component reflected from the ceiling of the experimental room. The settings for the direct lighting component, on the other hand, were selected based on the reported outcomes of previous preference studies in the field of interior lighting. The resulting lighting conditions were evaluated by a total of 29 observers, from which subjective ratings of brightness, sky-likeness, satisfaction, pleasantness, and general appeal were collected in an office workplace environment. In this experimental setting, the most preferred lighting conditions exhibited a direct-to-indirect lighting ratio of 50:50 with a CCT of 4,000 K in the direct component and 6,500, 7,500, and 9,000 K in the indirect component. For all examined combinations, none was rated as truly sky-like. Nonetheless, the study results showed that only the combination of a warmer CCT in the direct component and a cooler, blue-enriched CCT in the indirect lighting component leads to a maximum in the subjects’ preference ratings. In summary, the subjects preferred light settings with a white appearance on the work surface without any intense or noticeable blue cast or tint.https://www.frontiersin.org/articles/10.3389/fbuil.2023.1101534/fullsky-like lightingblue enrichedceiling illuminationhuman-centric lightingpreference |
| spellingShingle | Stefan Klir Sebastian Babilon Sebastian Babilon Paul Myland Simon Benkner Tran Quoc Khanh Sky-like interior light settings: a preference study Frontiers in Built Environment sky-like lighting blue enriched ceiling illumination human-centric lighting preference |
| title | Sky-like interior light settings: a preference study |
| title_full | Sky-like interior light settings: a preference study |
| title_fullStr | Sky-like interior light settings: a preference study |
| title_full_unstemmed | Sky-like interior light settings: a preference study |
| title_short | Sky-like interior light settings: a preference study |
| title_sort | sky like interior light settings a preference study |
| topic | sky-like lighting blue enriched ceiling illumination human-centric lighting preference |
| url | https://www.frontiersin.org/articles/10.3389/fbuil.2023.1101534/full |
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