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Levin, who as served as the principal technical advisor to the project through his work with the IESNA Lighting Maintenance Committee, pointed out that the original 50-year-old study was conducted in the era before widespread air-conditioning, during which many office and industrial tasks were different if and produced different types of dirt in the work place than is commonplace today. Levin, who has served as the principal technical advisor to the project through his work with the IESNA Lighting Maintenance Committee, pointed out that the original 50-year-old study was conducted in the era before widespread air-conditioning, during which many office and industrial tasks were different and produced different types of dirt in the work place than is commonplace today. |
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