الفهرس 
Chapter: one Introductio nOnly 14 pages are availabe for public view
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Abstract
Energy consumption has become a major concern of global discussions among engineers, architects, scientists & planners. There are many ways to tackle this issue by saving energy in numerous sectors. Lighting is one way used to saving energy as it is used in many applications & it is one of the areas that should be addressed to improve the energy efficiency in order to reducing the energy consumption. Natural DL inside space is considered one of the most important affairs because of its importance in caving energy consumption & its ability to provide a comfort environment inside space for occupants. Daylight in the residential building is a major shareholder to save the energy consumption because it is the most significant natural resources available to engineers & architects to improve the visual comfort quality of interior spaces. A considerable reduction in artificial lighting & energy consumption can be achieved by maximizing the use of natural day lighting. So, strategies are needed for more DL optimization in the residential building spaces where electricity demand is very high. The main aim of this study is to study all factors which architects should consider in daylight design, namely: fenestration, climate conditions, orientations, and shading devices. in addition to a practical study by using simulations tools (rhino software by using diva plugin in rhino program) In an attempt to reach a design drafting ensure the availability of optical comfortable environment of residential building. Finally discussing & analyzing results of simulation process.