The impact of ambient temperature on the spectral characteristics of LED sources in the context of astronomical observations of the night sky


  • Przemysław Tabaka Lodz University of Technology
  • Sylwester Kołomański Astronomical Institute, University of Wrocław



The Spectral Power Distribution (SPD) of artificial light sources is a crucial factor in determining the extent of night sky degradation due to light pollution. External temperature affects the properties of LED lamps, including their SPD. In this study, we investigated the impact of ambient temperatures ranging from -25°C to 25°C on the spectral characteristics of 14 LED sources used in outdoor lighting. The obtained SPDs were then used to calculate the Scotopic Sky Luminance Ratio index, enabling the assessment of changes in night sky degradation.

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How to Cite

P. Tabaka and S. Kołomański, “The impact of ambient temperature on the spectral characteristics of LED sources in the context of astronomical observations of the night sky”, Photonics Lett. Pol., vol. 16, no. 1, pp. 7–9, Apr. 2024.