Daylight in Underground Architecture

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The use of natural light in (underground) architecture is beneficial for both the human wellbeing as well as the quality of the architecture. However innovative systems are needed to bring natural daylight in underground spaces. The daylighting systems, which are classified as light guiding systems and light transporting systems have been reviewed and compared. The advantages and disadvantages of each system are summarized in order to be able to choose a system that fits within the architecture of the underground ‘building’.