Long-Term Monitoring Campaign of LED Street Lighting Systems: Focus on Photometric Performances, Maintenance and Energy Savings

Lodovica Valetti, Gabriele Piccablotto, Rossella Taraglio and Anna Pellegrino ()
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Lodovica Valetti: TEBE Research Group, Department of Energy “Galileo Ferraris”, Politecnico di Torino, 10129 Turin, Italy
Gabriele Piccablotto: Analysis and Modelling of Environmental System Laboratory (LAMSA), Department of Architecture and Design, Politecnico di Torino, 10129 Turin, Italy
Rossella Taraglio: Analysis and Modelling of Environmental System Laboratory (LAMSA), Department of Architecture and Design, Politecnico di Torino, 10129 Turin, Italy
Anna Pellegrino: TEBE Research Group, Department of Energy “Galileo Ferraris”, Politecnico di Torino, 10129 Turin, Italy

Sustainability, 2023, vol. 15, issue 24, 1-32

Abstract: The renovation of public lighting installations by replacing the traditional systems with LED technologies and introducing smart lighting control systems is a policy widely adopted to contain energy consumption and expenditure. Additionally, the long-term monitoring of the depreciation of the new lighting systems is a crucial issue. The aim of this study is to report the results of in-field measurements of new LED lighting systems in the city of Turin (Italy). A method was defined to assess: (i) energy performance (through data from the remote-control system); (ii) photometric performance (through in-field measurement campaigns); and (iii) depreciation of the photometric performance over a period of approximately 5 years. Results demonstrated that the new LED systems allow us to achieve an average energy saving of 51% compared to the ex-ante condition, improving the photometric performances and compiling the standard requirements by lowering the over-illumination levels. Moreover, the measured depreciation of the LED systems over time was compared with the predicted depreciation, estimated based on the calculation method proposed in Standards BS 5489-1:2020 and ISO/CIE TS 22012:2019. The results obtained showed that the measured depreciation of the photometric performance was closer to the predicted depreciation trend according to BS 5489-1:2020 (variations between 0% and 4%), while greater variations (between 17% and 23%) emerged considering the ISO/CIE TS 22012:2019.

Keywords: street lighting; lighting retrofit; LED lighting; lighting monitoring; photometric performances; energy performances; energy savings; depreciation of lighting performances; maintenance factor (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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