Abstract
The article presents the results of the studies concerning the influence of a light source installed in luminaire of opal sphere type on the light pollution effect of the night sky. It is known from literature reports that the effect of light pollution is influenced by the spectral distribution of light. Although the influence of the spectral distribution has been widely studied from different perspectives, there is still a need to study this phenomenon—for example, from the point of view of the spectral reflection properties of the ground, on which the lanterns are installed. Hence, the above-mentioned aspect was considered in the authors’ investigations. The luminaire considered has been equipped with 20 different light sources, including the latest generation of lamps (light-emitting diodes, LEDs) as well as the conventional ones. With respect to these light sources, the measurements of light distribution and spectral distribution of emitted radiation of the luminaire were performed. Having these measurement data, the simulations were carried out using the DIALux software, and the calculations were made using the specially prepared calculation tool. On the basis of the results obtained in this way this was stated that the type of light source installed in the luminaire has a significant effect on the sky glow. An important factor affecting light pollution is not only the value of the luminous flux emitted upward but also the spectral characteristics of the emitted radiation, the impact of which is most noticeable. The conclusions from the studies indicate the next steps in the analysis of the light pollution effect. These steps will be focused on extended analysis of LEDs as modern and developed light sources.
Highlights
IntroductionMore and more attention has been devoted to ecology-based issues
In recent years, more and more attention has been devoted to ecology-based issues
In the case of light-emitting diodes (LEDs), compact fluorescent lamps (CFLs), incandescent lamps lamps (INCs), and induction lamps (ILs) lamps, which are equipped with electronic power supply integrated with the lamp, the light sources were directly connected to the mains using specially designed fittings (Figure 2a)
Summary
More and more attention has been devoted to ecology-based issues. They have been considered among the communities of different areas such as electrical, chemical, or mechanical engineering. In the area of lighting technique, the ecological trends have been visible [1,2,3,4,5,6]. Within these trends, one of the problems taken into account by researchers is the problem of light pollution, which is associated with the lighting of outdoor areas. One of the forms of light pollution is the formation of a sky glow, which usually takes place over urban areas [11]
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