This paper presents a newly developed mirror sunlighting system approach that would enable architects to consider daylighting goals by engaging the sunlighting system in early design process to make up for the handicaps of lower daylighting availability due to the geographical disadvantage of obstructed location of the building. A mirror sunlighting system was developed and installed in a building complex and its performance was measured in terms of illuminance and luminance with critical meteorological variables. The findings of this study make recommendations for use of appropriate optical daylighting systems for building applications and suggest directions for future development to facilitate wider acceptance of optical systems. The results of the case studies of recently-built examples indicate that the sunlighting system may retain some of the visual qualities of the space's sustainability, such as maximizing daylighting. A series of analysis implied that the sky conditions should be carefully considered in the prediction of daylighting performance of a mirror sunlighting system.
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