Lightscape as an Evaluation Tool of Daylighting and Visual Performance

A computer simulation on artificial lighting and daylighting using computer programs is an analyzing method that can offer various weather conditions while simultaneously eliminating difficulties in producing a model experiment and reducing errors in measurement. Many A simulation programs on daylighting have been released freely or commercialized for selling, however, a demonstration of their availability and validity as a tool for evaluating daylighting performance is required since each one has its own characteristics. The objectives of this study lie in suggesting an application method of evaluation tools and demonstration of limits and characteristics so as to more easily determine the daylighting performance in the very initial stages of planning for an arbitrary office space in which windows with daylight access are built. Weproduced scale model of the general light inducing type side lighting with lightshelf and ceiling, and the luminance (at 78 measuring points) and illuminance (at 84 measuring points) were measured in a clear sky. And a comparison of the measured values and the calculated values from a computer simulation using the Lightscape program was performed.