Daylighting Design for Refurbishment of Built Heritage: A Case Study

This paper wants to present a study on natural light design for an historic lighthouse building. The design solution proposed for the old Capo Murro di Porco lighthouse (SR, Italy) starts from a deep knowledge of lighthouse typology, its history and technological characteristics. The refurbishment solution is based on solar radiation control and advanced daylight system application (new skylight) without modifying the external envelope of the building preserving its cultural heritage and complaining with architectural constraints. The main goals are to increase lighting energy savings due to less artificial lighting system utilization and to improve the uniformity of luminance distribution and levels at long indoor distances from the windows under variable sun and sky conditions throughout the year. A method and solution were also proposed for evaluating and improving daylight distribution in the atrium and adjacent rooms using a combination of skylight and light redirecting devices.