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Abstract
This study aims to identify the role of interior lighting in buildings in increasing light pollution, defined as the excessive use of artificial lighting that negatively affects humans, wildlife and clear astronomical vision. The research question is what aspects of interior lighting are the causes of external light pollution. In order to answer the research question, a qualitative approach was followed, by interviewing six lighting specialists, and using a questionnaire to ascertain the views of twenty-one interior designers interested in designing interior lighting. The data collection employed two axes: the first related to the characteristics of the indoor lighting unit, and the second related to factors affecting the interior lighting. The study concluded that interior lighting has a role in light pollution, which depends on its characteristics and the nature of the interior space, through the infiltration of lighting from the interior space to the outside of the building through the architectural openings, due to the lack of consideration of the following determinants of lighting installation in the space, such as the angle of illumination and the number of lighting units and the characteristics of the space in terms of colour, material and openings. We hope that the results of the study will benefit designers in helping to maintain environmental sustainability and reducing the increase in light pollution.
Highlights
The results of each of the interviews with lighting specialists and the questionnaire sent to those interested in lighting design revealed the views of the sample, based on their technical information, experiences and expectations, and helped to identify the role of interior lighting in light pollution
With regard to the different effects of types of indoor lighting on light pollution, four specialists stated that the type of indoor lighting unit has no effect on light pollution, but the effect depends on other characteristics of the lighting unit, such as diffusion and the amount of lighting
Specialist (1) stated that the intensity of internal lighting is related to light pollution, in the case of architectural openings that allow a large amount of light to leak into the external surroundings
Summary
With the increase in world population, the use of artificial lighting in housing. Has increased, which has led to the phenomenon of light pollution. Light pollution has been defined as the excessive use of artificial lighting that overshadows the light of the stars and the moon and causes changes in natural lighting at night (Falchi et al, 2011; Kamel et al, 2020). Light pollution is concentrated in cities with high population densities, as a result of the excessive use of lighting whose rays are reflected and refracted in the air and increase light pollution, which affects the residents quality of life, while uninhabited areas are the least polluted (Czarnecka et al, 2021; Posudin, 2014). Examples of lighting that cause this form of pollution include street lighting, indoor and outdoor building lighting, and billboards (Posudin, 2014)
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