Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.

Artificial light at night can be harmful to the environment, and interferes with fauna and flora, star visibility, and human health. To estimate the relative impact of a lighting device, its radiant power, angular photometry and detailed spectral power distribution have to be considered. In this pap...

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Autores principales:	Martin Aubé, Johanne Roby, Miroslav Kocifaj
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2013
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/528dfce1ef6847e9930a06a106ccc606
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spelling	oai:doaj.org-article:528dfce1ef6847e9930a06a106ccc6062021-11-18T07:38:26ZEvaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.1932-620310.1371/journal.pone.0067798https://doaj.org/article/528dfce1ef6847e9930a06a106ccc6062013-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/23861808/?tool=EBIhttps://doaj.org/toc/1932-6203Artificial light at night can be harmful to the environment, and interferes with fauna and flora, star visibility, and human health. To estimate the relative impact of a lighting device, its radiant power, angular photometry and detailed spectral power distribution have to be considered. In this paper we focus on the spectral power distribution. While specific spectral characteristics can be considered harmful during the night, they can be considered advantageous during the day. As an example, while blue-rich Metal Halide lamps can be problematic for human health, star visibility and vegetation photosynthesis during the night, they can be highly appropriate during the day for plant growth and light therapy. In this paper we propose three new indices to characterize lamp spectra. These indices have been designed to allow a quick estimation of the potential impact of a lamp spectrum on melatonin suppression, photosynthesis, and star visibility. We used these new indices to compare various lighting technologies objectively. We also considered the transformation of such indices according to the propagation of light into the atmosphere as a function of distance to the observer. Among other results, we found that low pressure sodium, phosphor-converted amber light emitting diodes (LED) and LED 2700 K lamps filtered with the new Ledtech's Equilib filter showed a lower or equivalent potential impact on melatonin suppression and star visibility in comparison to high pressure sodium lamps. Low pressure sodium, LED 5000 K-filtered and LED 2700 K-filtered lamps had a lower impact on photosynthesis than did high pressure sodium lamps. Finally, we propose these indices as new standards for the lighting industry to be used in characterizing their lighting technologies. We hope that their use will favor the design of new environmentally and health-friendly lighting technologies.Martin AubéJohanne RobyMiroslav KocifajPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 8, Iss 7, p e67798 (2013)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Martin Aubé Johanne Roby Miroslav Kocifaj Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.
description	Artificial light at night can be harmful to the environment, and interferes with fauna and flora, star visibility, and human health. To estimate the relative impact of a lighting device, its radiant power, angular photometry and detailed spectral power distribution have to be considered. In this paper we focus on the spectral power distribution. While specific spectral characteristics can be considered harmful during the night, they can be considered advantageous during the day. As an example, while blue-rich Metal Halide lamps can be problematic for human health, star visibility and vegetation photosynthesis during the night, they can be highly appropriate during the day for plant growth and light therapy. In this paper we propose three new indices to characterize lamp spectra. These indices have been designed to allow a quick estimation of the potential impact of a lamp spectrum on melatonin suppression, photosynthesis, and star visibility. We used these new indices to compare various lighting technologies objectively. We also considered the transformation of such indices according to the propagation of light into the atmosphere as a function of distance to the observer. Among other results, we found that low pressure sodium, phosphor-converted amber light emitting diodes (LED) and LED 2700 K lamps filtered with the new Ledtech's Equilib filter showed a lower or equivalent potential impact on melatonin suppression and star visibility in comparison to high pressure sodium lamps. Low pressure sodium, LED 5000 K-filtered and LED 2700 K-filtered lamps had a lower impact on photosynthesis than did high pressure sodium lamps. Finally, we propose these indices as new standards for the lighting industry to be used in characterizing their lighting technologies. We hope that their use will favor the design of new environmentally and health-friendly lighting technologies.
format	article
author	Martin Aubé Johanne Roby Miroslav Kocifaj
author_facet	Martin Aubé Johanne Roby Miroslav Kocifaj
author_sort	Martin Aubé
title	Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.
title_short	Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.
title_full	Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.
title_fullStr	Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.
title_full_unstemmed	Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.
title_sort	evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.
publisher	Public Library of Science (PLoS)
publishDate	2013
url	https://doaj.org/article/528dfce1ef6847e9930a06a106ccc606
work_keys_str_mv	AT martinaube evaluatingpotentialspectralimpactsofvariousartificiallightsonmelatoninsuppressionphotosynthesisandstarvisibility AT johanneroby evaluatingpotentialspectralimpactsofvariousartificiallightsonmelatoninsuppressionphotosynthesisandstarvisibility AT miroslavkocifaj evaluatingpotentialspectralimpactsofvariousartificiallightsonmelatoninsuppressionphotosynthesisandstarvisibility
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Evaluating potential spectral impacts of various artificial lights on melatonin suppression, photosynthesis, and star visibility.

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