Preliminary Experiment on Daylighting Performance of Lightpipe under Different Sky Conditions

In order to ensure that daylight buildings will become the preferred option in this millennium, it is necessary to optimise energy savings by taking into account the integration of daylighting. Lightpipe systems are considered to save lighting energy and improve visual comfort. Accordingly, the purpose of this study is daylight performance of Lightpipe under overcast sky and clear sky. For the purpose, lightpipe system was designed as 650 diameter, with and aspect ratio of 2. Agilent data logger and photometric sensor were used. Lightfactor and illuminance were used to analyse daylight performance under different sky condition.