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Figure 4

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Existing conditions. Illuminance distribution in C1 due to natural light on 31 January by representation with combination of false colour maps and isolux lines. At the top: illuminance lx with overcast sky conditions and hour 9,00 (left); illuminance lx with overcast sky conditions and hour 16,00 (right). At the bottom: illuminance lx with clear sky conditions and hour 9,00 (left); illuminance lx with clear sky conditions at hour 16,00 (right).

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