الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
Inadequate lighting plans for the operations performed at night on construction sites can affect the quality of the implemented work, labor productivity, safety, as well as the project’s overall cost. Accordingly, to avoid inadequate lighting conditions, the location of the luminaries utilized to illuminate the chosen construction area and its configuration, including luminaire height and luminary angle, are crucial choices in the design of the lighting plan. Besides making sure that the chosen installation pattern is costeffective and as much as possible meets the lighting levels needed for each point according to the nature of the implemented work and safety considerations, in this way, a maximal coverage location model using LINGO software is developed in order to investigate the best locations of luminaires, taking into account gradual and cooperative covering. The objective is to ensure that the selected allocation of luminaires minimizes the summation of the received illuminance by the points that exceed the demand and the received illuminance that is below the demand. The optimized results refer to that smaller luminary angles lead to large coverage and minimizes the objective function. Making sure that the selected luminaire height leads to the desired illuminance levels according to the inverse relationship between the height and the illuminance.