SPECTRAL AND PHOTOMETRIC ANALYSIS SELECTED STREETLIGHTS

 

DOWNLOAD DOI: 10.62897/COS2025.3-1.210

Klemen Tršinar*, Melani Potrč, Damjan Dovnik, Mitja Slavinec and Eva Klemenčič
Faculty of Natural Sciences and Mathematics, University of Maribor, Maribor, Slovenia
*klemen.trsinar@student.um.si

Abstract: Artificial extension of daylight represents one of the key needs of modern society, especially during the winter months when daylight hours are shorter than nighttime. Artificial lighting enables increased productivity in the evening and at night, supports recreational activities, and facilitates the effective use of leisure time. In addition, it significantly contributes to the perception of safety. Despite its numerous advantages, artificial light also has negative effects. Among the most significant are the deterioration of sleep quality, a reduction in local biodiversity, and increased stress levels in both nocturnal and diurnal animal species. In this case study, eleven roadside luminaires located on the Gosposvetska student campus in Maribor, Slovenia were analysed. For each luminaire, consecutive light spectra were recorded and subsequently averaged to reduce measurement error. At the same time, three repeated brightness measurements were performed. The results revealed differences among the eleven analysed luminaires that can be classified into two groups: broad-spectrum cold-white LED sources and narrow-band discharge-type light sources. Measured brightness values ranged from 7.22 to 10.71 mag arcsec-2. The collected data provide a basis for further analysis of the effects of artificial light on living organisms and contribute to a better understanding of the ecological consequences of light pollution. 

 

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