A feasibility study for hybrid lighting systems

Hybrid systems simultaneously deliver daylight and electric light into a building where they are combined and distributed via luminaires. Hybrid technology is described together and that of the more established of tubular daylight guidance lighting systems. Likely system performance in terms of daylight delivery and potential electricity savings are evaluated for representative geographic locations throughout the world. The results indicate a considerable variation in performance as a function of system type, geographic location, and building geometry, suggesting that choice of appropriate light guidance system may be strongly influenced by the solar resource at the building location.