Turn on Dark Skies - The Influence of Facade Geometry on Light Pollution

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Examensarbete för masterexamen
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2019
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Milićević, Ivana
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The Andromeda Galaxy, the nearest major galaxy to our own (Milky Way, 200 billion stars) holds as many as 250 billion (2.5x1010) stars. Everything that we can see, without the visual aid, belongs to these two galaxies; yet, on a clear day, from a dark rural retreat, our eyes can see only between 2000 and 3000 stars (people with exceptional vision can see up to 7000 stars). On the other side, there are places on our planet from which nothing outside the Solar System is ever seen in the sky. This is directly influenced by the overuse of artificial lighting and is defined as light pollution. This master’s thesis is looking into the problem of Light pollution, understanding and presenting positive and negative aspects of artificial lighting, and proposing a new way architect can work to reduce it. It is known that surface geometry has an impact on light reflection; however, very few research projects were based on the effect of geometry on light pollution. The main objective of this research is to identify how facade geometry could influence and control light reflection to reduce the overall problem of light pollution. This graduation project focuses on facade design in the form of vertical fins using a parking house in the centre of Gothenburg, Sweden, as a case study. Form of the individual element is defined to prevent waste light from spreading. Further, materialisation of the fins is proposed to illustrate how both, micro and macro scale of geometry can influence light reflection, therefore reduce or enhance light pollution.
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