Fotios, S. orcid.org/0000-0002-2410-7641 and Robbins, C. orcid.org/0000-0002-6076-5983 (2020) Research note: Describing average illuminance for P-class roads. Lighting Research & Technology, 52 (8). pp. 1057-1062. ISSN 1477-1535
Abstract
Design criteria for lighting in subsidiary roads usually include a minimum average horizontal illuminance, widely assumed to be the arithmetic mean illuminance. Analyses of the illuminance distributions over thirty road sections shows that the distributions are not normal and hence the median is more appropriate than the arithmetic mean as a measure of central tendency: the medians are significantly lower than the arithmetic means but the two are highly correlated. Design recommendations should state whether it is the arithmetic mean or median and not just the ‘average’ that is required.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2020 The Chartered Institution of Building Services Engineers. This article is distributed under the terms of the Creative Commons Attribution 4.0 License (https://creativecommons.org/licenses/by/4.0/) which permits any use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage). |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Social Sciences (Sheffield) > School of Architecture (Sheffield) |
Funding Information: | Funder Grant number ENGINEERING AND PHYSICAL SCIENCE RESEARCH COUNCIL EP/S004009/1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 16 Mar 2020 11:31 |
Last Modified: | 04 Dec 2020 18:05 |
Status: | Published |
Publisher: | SAGE Publications |
Refereed: | Yes |
Identification Number: | 10.1177/1477153520911193 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:158459 |