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Abstract

The application of solid-state light sources in luminaires creates a new quality in illumination design works. In a confrontation with a commonly used but relatively unattractive flood method, the use of small-size luminaires allows one to present an illuminated architectural object in a more attractive way in the evening and at night. In this case, it is possible to apply the principles of illumination described in the literature, especially the principle of height amplification and the principle of depth amplification. The conceptual work of illumination with the use of a large number of small-size luminaires does not require the use of supporting graphical tools, but the specification of actual lighting equipment using only polygonal samples in this case is not possible. The paper presents selected issues of the key stages of the completed work. Using specialized computer software, a geometric model of the architectural object has been developed, facade materials have been parameterized, models of small-size illuminating equipment have been selected and, finally, calculations of luminance distribution on illuminated surfaces have been carried out. As a result of computer work, luminance distributions and photorealistic visualizations of illuminations from defined main directions of observation were obtained. The Lubomirski Palace in Przemysl is an example of the architectural object indicated for detailed works.
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Authors and Affiliations

Antoni Różowicz
1
ORCID: ORCID
Henryk Wachta
2
Sebastian Różowicz
1
ORCID: ORCID

  1. Department of Industrial Electrical Engineering and Automatic Control, Kielce University of Technology, Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland
  2. Department of Power Electronics and Power Engineering, Rzeszow University of Technology, Wincentego Pola 2, 35-959 Rzeszow, Poland
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Abstract

The article presents selected results of research on improving pedestrian traffic safety. Based on annually-updated accident statistics made available by the police, as well as the new pedestrian traffic regulations in force, detailed work was undertaken to assess the level of visibility of pedestrians by drivers in pedestrian crossing areas. The research was carried out by analyzing several characteristic cases of pedestrian crossings occurring in Poland, in which there was only dedicated lighting for crossings, only street lighting, and a variant of coexistence of both of the above lighting solutions. Illuminance measurements were made in the horizontal and vertical planes of pedestrian crossings, and the results were confronted with the relevant guidelines. The next step involved a complementary measurement of the luminance distribution of the vertical plane containing the pedestrian and a portion of the sub- and super-horizontal background. Visibility pedestrians was considered in positive and negative contrast variants, and was then related to the obtained results of the illumination distribution. The analysis of the results of the study indicated the possibility of limited visibility of pedestrians at the crossings despite the satisfactory results obtained from measurements of the illuminance distribution within the crossings.
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Authors and Affiliations

Sebastian Różowicz
1
ORCID: ORCID
Krzysztof Baran
2
ORCID: ORCID
Antoni Różowicz
1
ORCID: ORCID
Marcin Leśko
2
ORCID: ORCID
Lubomír Beňa
3
ORCID: ORCID

  1. Department of Industrial Electrical Engineering and Automatic Control Kielce University of Technology Tysiąclecia Państwa Polskiego 7, 25-314 Kielce, Poland
  2. Department of Power Electronics and Power Engineering, Rzeszow University of Technology Wincentego Pola 2, 35-959 Rzeszow, Poland
  3. Department of Electrical Power Engineering, Faculty of Electrical Engineering and Informatics (FEI) Technical University of Kosice, Letna 9, Kosice, 040 01, Slovakia

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