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Substituting for Sunlight

Has a New Era of Artificial Lighting Arrived? Illumination That Approximates Sunlight Is Foreshadowed

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Scientific American Magazine Vol 142 Issue 4This article was originally published with the title “Substituting for Sunlight” in Scientific American Magazine Vol. 142 No. 4 (), p. 300
doi:10.1038/scientificamerican0430-300