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Influence of the perceived size of a light source on non-visual effects in humans

  • Arvid Niemeyer EMAIL logo , Lucia Rottmair , Cornelius Neumann and Cornelius Möckel
Published/Copyright: October 5, 2020
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Advanced Optical Technologies
From the journal Advanced Optical Technologies Volume 9 Issue 6

Abstract

Light not only enables humans to perceive their surroundings, but also influences their sleep–wake cycle, mood, concentration and performance. Targeted use of these so called nonvisual effects could also have a positive contribution in automobiles by keeping passengers alert, minimizing error rates or bootsting attention in general. Since construction space in vehicle interios is scarce, this study compared the influence of differently-sized light panels and thus solid angles on nonvisual effects. In a counterbalanced order, 32 volunteers were exposed to three lighting conditions in the morning: baseline (12 lx, 2200 K), small (200 lx, 6500 K, 0.05 sr) and large (200 lx, 6500 K, 0.44 sr). During each session of 60 min, alertness, concentration and working memory were assessed before and during light exposure. After data analysis no significant main effects of light, measurement point or interaction between light and measurement point could be seen.

Keywords: alertness; bright light exposure; non-visual effects; solid angle
Corresponding author: Arvid Niemeyer, Audi AG, Ingolstadt, Germany; and Light Technology Institute, Karlsruhe Institute of Technology, Karlsruhe, German, E-mail:

Funding source: Audi AG

Acknowledgements

This study was funded by AUDI AG.

  1. Author contribution: AN: Conception and design, data analysis, interpretation of data, drafting the article. LR: Conception and design, data collection. CN: Conception and design. CM: Lighting simulation.

  2. Research funding: This study was funded by AUDI AG.

  3. Conflict of interest statement: Arvid Niemeyer is employed at Audi AG, who also funded the study.

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Received: 2020-07-05
Accepted: 2020-09-14
Published Online: 2020-10-05
Published in Print: 2020-12-16

© 2020 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. Community
  3. News
  4. Topical Issue: Automotive Lighting; Guest Editor: Cornelius Neumann
  5. Editorial
  6. Automotive lighting
  7. Letter
  8. Development of HD-headlamps with high-performance projectors
  9. Research Articles
  10. Imaging vehicle-to-vehicle communication using visible light
  11. Manufacturing of volume holographic cell arrays for usage with uncollimated LEDs in automotive applications
  12. Personalised neural networks for a driver intention prediction: communication as enabler for automated driving
  13. Development of a high resolution scanning RGB laser headlamp
  14. Review articles
  15. Temporal coherence properties of laser modules used in headlamps determined by a Michelson interferometer
  16. Influence of the perceived size of a light source on non-visual effects in humans
https://doi.org/10.1515/aot-2020-0041
Keywords for this article
alertness; bright light exposure; non-visual effects; solid angle

Articles in the same Issue

  1. Frontmatter
  2. Community
  3. News
  4. Topical Issue: Automotive Lighting; Guest Editor: Cornelius Neumann
  5. Editorial
  6. Automotive lighting
  7. Letter
  8. Development of HD-headlamps with high-performance projectors
  9. Research Articles
  10. Imaging vehicle-to-vehicle communication using visible light
  11. Manufacturing of volume holographic cell arrays for usage with uncollimated LEDs in automotive applications
  12. Personalised neural networks for a driver intention prediction: communication as enabler for automated driving
  13. Development of a high resolution scanning RGB laser headlamp
  14. Review articles
  15. Temporal coherence properties of laser modules used in headlamps determined by a Michelson interferometer
  16. Influence of the perceived size of a light source on non-visual effects in humans
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