Influence of replacing discharge lamps with LED sources in outdoor lighting installations on astronomical observations

• Autorzy: Tabaka, Przemysław , Kołomański, Sylwester
• Języki publikacji: EN

Abstrakty

EN

Light pollution has a detrimental effect on astronomy. Artificial light emitted from outdoor lighting increases the brightness of the night sky, making it difficult to observe astronomical objects. The spectral power distribution of artificial light sources is one of the key factors determining how much the night sky is deteriorated by light pollution. The ongoing replacement of discharge lamps with LED sources may have a major impact on astronomy because LED spectra usually cover the entire visible radiation range. This paper provides an analysis of the impact of LED sources with correlated color temperature in the range from 1000 K to approximately 10 000 K on visual and instrumental astronomical observations. For each analyzed artificial source, the Starlight Contamination Degree (SCD) index, i.e. a quantity that allows for quick evaluation of the impact of the sources on the night sky, is calculated. The reflection of artificial light from different ground surfaces and its scattering in the atmosphere was included in the calculation of the SCD index. LED lamps with very low values of correlated color temperature (CCT) and color rendering index (CRI) were found to possibly have a similar or even smaller impact on astronomical observations than sodium discharge lamps. Moreover, professional astronomical observations are more affected by LED lamps than visual observations, even for lamps with the lowest CCT and CRI. Thus, additional measures (e.g. reducing lumen output) should be applied to protect observational conditions. The results of the study help to assess which LED lamps can be used, and which should be avoided in the protection zones around astronomical observing sites.

Słowa kluczowe

PL

źródła LED; zanieczyszczenie światłem; stopień zanieczyszczenia światłem gwiazd; SCD; obserwacja astronomiczna

EN

LED sources; light pollution; astronomical observations; Starlight Contamination Degree; SCD

• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2023
• Tom: Vol. 71, nr 6
• Strony: art. no. e147915
• Opis fizyczny: Bibliogr. 37 poz., rys.

Twórcy

autor

Tabaka, Przemysław

• Institute of Electrical Power Engineering, Lodz University of Technology, Lodz, Poland,

autor

Kołomański, Sylwester

• Astronomical Institute, University of Wrocław, Wrocław, Poland

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).

Identyfikatory

DOI

10.24425/bpasts.2023.147915