Perception of Human Skin in Street Lighting under Five Types of Led Spectra

Marc Fontoynont, Lucie Bruyère, Joachim Blanc-Gonnet

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

A panel of observers has been invited to rate and compare the quality of 5 spectra of LED sources used for street lighting, on 30 subjects. Vertical illuminance on faces was 14 lx (+/- 3 lx) . All 30 subjects did not have the same type of skin. 60% were from the European Caucasian type (clear skin), 23 % from the Asian one, 17% were from the Sub-Saharan type (dark skin). All subjects were also acting as observers. Correlated Colour temperature of sources was 2200K , 2700K, 3200K, 4000K, 4800K. This was obtained by mixing cool-white, warm-white and red LEDs (for the 2200 K and 2700 K sources only). The xtreme stimuli (2200K and 4800K) were rejected by all participants. When presented in pairs (Thurstone protocole), 75% of observers preferred the 3200K stimulus, 61% the 4000 K stimulus, 59% preferred the 2700K stimulus. People with Asian skin was found to be preferred under CCT of 3200 K and below, for Sub-saharan skin type it was 3200K and above, and for Caucasian around 3200 K.
Original languageEnglish
Title of host publicationProceedings of CIE Centenary Conference "Towards a New Century of Light"
Number of pages7
PublisherCIE
Publication date2013
ISBN (Electronic)978-3-902842-44-2
Publication statusPublished - 2013
EventTowards a new century of light - Paris, France
Duration: 12 Apr 201319 Apr 2013

Conference

ConferenceTowards a new century of light
CountryFrance
CityParis
Period12/04/201319/04/2013
SeriesC I E. Publication
VolumeCIE x038:2013 (including Addendum 1)
ISSN1011-6567

Cite this

Fontoynont, M., Bruyère, L., & Blanc-Gonnet, J. (2013). Perception of Human Skin in Street Lighting under Five Types of Led Spectra. In Proceedings of CIE Centenary Conference "Towards a New Century of Light" CIE. C I E. Publication, Vol.. CIE x038:2013 (including Addendum 1)
Fontoynont, Marc ; Bruyère, Lucie ; Blanc-Gonnet, Joachim. / Perception of Human Skin in Street Lighting under Five Types of Led Spectra. Proceedings of CIE Centenary Conference "Towards a New Century of Light" . CIE, 2013. (C I E. Publication, Vol. CIE x038:2013 (including Addendum 1)).
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abstract = "A panel of observers has been invited to rate and compare the quality of 5 spectra of LED sources used for street lighting, on 30 subjects. Vertical illuminance on faces was 14 lx (+/- 3 lx) . All 30 subjects did not have the same type of skin. 60{\%} were from the European Caucasian type (clear skin), 23 {\%} from the Asian one, 17{\%} were from the Sub-Saharan type (dark skin). All subjects were also acting as observers. Correlated Colour temperature of sources was 2200K , 2700K, 3200K, 4000K, 4800K. This was obtained by mixing cool-white, warm-white and red LEDs (for the 2200 K and 2700 K sources only). The xtreme stimuli (2200K and 4800K) were rejected by all participants. When presented in pairs (Thurstone protocole), 75{\%} of observers preferred the 3200K stimulus, 61{\%} the 4000 K stimulus, 59{\%} preferred the 2700K stimulus. People with Asian skin was found to be preferred under CCT of 3200 K and below, for Sub-saharan skin type it was 3200K and above, and for Caucasian around 3200 K.",
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Fontoynont, M, Bruyère, L & Blanc-Gonnet, J 2013, Perception of Human Skin in Street Lighting under Five Types of Led Spectra. in Proceedings of CIE Centenary Conference "Towards a New Century of Light" . CIE, C I E. Publication, vol. CIE x038:2013 (including Addendum 1), Paris, France, 12/04/2013.

Perception of Human Skin in Street Lighting under Five Types of Led Spectra. / Fontoynont, Marc; Bruyère, Lucie; Blanc-Gonnet, Joachim.

Proceedings of CIE Centenary Conference "Towards a New Century of Light" . CIE, 2013. (C I E. Publication, Vol. CIE x038:2013 (including Addendum 1)).

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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T1 - Perception of Human Skin in Street Lighting under Five Types of Led Spectra

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AU - Bruyère, Lucie

AU - Blanc-Gonnet, Joachim

PY - 2013

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N2 - A panel of observers has been invited to rate and compare the quality of 5 spectra of LED sources used for street lighting, on 30 subjects. Vertical illuminance on faces was 14 lx (+/- 3 lx) . All 30 subjects did not have the same type of skin. 60% were from the European Caucasian type (clear skin), 23 % from the Asian one, 17% were from the Sub-Saharan type (dark skin). All subjects were also acting as observers. Correlated Colour temperature of sources was 2200K , 2700K, 3200K, 4000K, 4800K. This was obtained by mixing cool-white, warm-white and red LEDs (for the 2200 K and 2700 K sources only). The xtreme stimuli (2200K and 4800K) were rejected by all participants. When presented in pairs (Thurstone protocole), 75% of observers preferred the 3200K stimulus, 61% the 4000 K stimulus, 59% preferred the 2700K stimulus. People with Asian skin was found to be preferred under CCT of 3200 K and below, for Sub-saharan skin type it was 3200K and above, and for Caucasian around 3200 K.

AB - A panel of observers has been invited to rate and compare the quality of 5 spectra of LED sources used for street lighting, on 30 subjects. Vertical illuminance on faces was 14 lx (+/- 3 lx) . All 30 subjects did not have the same type of skin. 60% were from the European Caucasian type (clear skin), 23 % from the Asian one, 17% were from the Sub-Saharan type (dark skin). All subjects were also acting as observers. Correlated Colour temperature of sources was 2200K , 2700K, 3200K, 4000K, 4800K. This was obtained by mixing cool-white, warm-white and red LEDs (for the 2200 K and 2700 K sources only). The xtreme stimuli (2200K and 4800K) were rejected by all participants. When presented in pairs (Thurstone protocole), 75% of observers preferred the 3200K stimulus, 61% the 4000 K stimulus, 59% preferred the 2700K stimulus. People with Asian skin was found to be preferred under CCT of 3200 K and below, for Sub-saharan skin type it was 3200K and above, and for Caucasian around 3200 K.

M3 - Article in proceeding

BT - Proceedings of CIE Centenary Conference "Towards a New Century of Light"

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Fontoynont M, Bruyère L, Blanc-Gonnet J. Perception of Human Skin in Street Lighting under Five Types of Led Spectra. In Proceedings of CIE Centenary Conference "Towards a New Century of Light" . CIE. 2013. (C I E. Publication, Vol. CIE x038:2013 (including Addendum 1)).