الفهرس 
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Abstract
For many years, daylight was the only efficient source of light available, Architecture was dominated by the goal of spanning wide spaces and creating openings large enough to distribute daylight to building interiors. It represents an important factor for the life of a human. It fulfills the needs of human and thus raising the efficiency of performance and production, while at the mean time reducing the electrical consumption and reducing environmental pollution. It is important for architects to consider the daylighting performance in the initial design stages, which reflects the design space quality, According to the local building codes there are a lot of minimum standard requirements for building heights, projections, areas of rooms and area of courts, in addition to the ratio of area of fenestrations for each space, Buildings skin shouldn‟t be only designed for its aesthetic aspects but also as a functioning element in the building. In this research study, the main daylight characteristics and building parameters affecting daylight design are analyzed and discussed through simulations of the main indicators used to quantify what makes a good daylighting design in order to refine the most applicable indicator to be used in residential building. These systems need to be integrated into a building‟s overall architectural strategy and incorporated into the design process from its earliest stages.To achieve this, the study will conduct a series of computer simulations to first show the effects of each parameter on the internal daylight efficiency and then provides a simplified metric method for measuring indoor daylight performance. Whereupon many strategies will be suggested leadings to effective solutions meet the daylight requirements of the space, which can contribute reducing the electrical demand, and helps achieve environmentally sustainable building development.The output of this study can be used as a pre-design tool to ensure that building spaces meet recommended daylight levels and protected from glare, reflections, and direct sunlight. The results can be converted to suggested guidelines towards an effective management for residential buildings regulation that could provide a strong outline for future buildings design based not only on theoretical solutions but also on practical simulations and evaluation tools.The research intends to reach to a geometrical relationship between the area of window and elevation angle constraint facing them through the application on a model of housing according to the determinants of the law regulating the construction work in Egypt, to achieve the universal norm of natural lighting allowed in these spaces through the use of the computer model has the flexibility to change as well as to identify variables that less can be done to raise the efficiency of lighting in this space according to the height of the obstruction in front of the window opening on the roads, and also an overview of advanced daylight technologies and daylight calculation. The studied case was parametrically modeled using Rhinoceros a 3D modeling software, Diva for-Rhino, daylighting simulation plug-in was used to interface Radiance and Daysim for annual daylighting simulation and illuminance calculation.