![]() HLS performance and potential application are influenced by many variables including system characteristics, building types, and location features. Illuminance data produced using the developed methods showed superiority over that produced using other available methods, with the additional advantages of simplicity and universal application. Furthermore, methods to estimate illuminance data, where measured data is unavailable, have been developed to help investigating systems performance over different geographical locations. An overall evaluation of HLS has been carried out. Potential applications of HLS in different buildings types and across a wide geographical region have been investigated. Investigations in this work have measured HLS performance in terms of light delivery, light quality, energy saving and economic performance. The one output device for both sources used in the HLS made it possible to no longer need for two distinct lighting systems to be installed in one space. A control system works to regulate this process to minimize the energy consumption. Prior to delivery of daylight, electric lighting source is added to instantly top up any possible shortage of daylight. HLS seek to maximize the utilization of daylight by tracking sunrays, and in most cases they are concentrated to minimize the light guidance size, which eases the installation and in turn increases the potential application of HLS. The development of the hybrid lighting systems (HLS) aims to satisfy these desires. There is a need to maximize the utilization of daylight, to optimize the integration between daylighting and electric lighting systems so as to increase the potential application of daylighting system. In order to meet the new requirements, new optical materials and technologies have been combined to produce innovative daylighting systems able to deliver daylight long distances into buildings. However, a return to the interest in natural lighting emerged with the energy crises in the 1970s. Needs for new types of buildings in conjunction with the great development of electric lamp led to the ascendancy of electric lighting. Daylight was the main source of lighting in vernacular architecture, and building design accordingly responded to its strategic limitations. ![]()
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