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Daylight is the occupied-range of light that is appropriate to the human visual response. Thus, it can contribute to human health, performance and productivity. Energy consumption can be reduced by improving in energy efficiency. The study emphaseson the design of lighting system that will be energy efficient. The basic purpose of this paper describes how to reduce the mounted lighting load and improve the illumination level as per international standards. A good lighting scheme should be based on more energy efficient & longer life and maintenance free equipment. In this research paper,a hypothetical study space is selected for the daylight analysis on the Ecotect and the Radiance software on summer solstice and winter solstice days under over cast sky condition. Ecotect software is used to determine lighting demand inside the selected study space and the obtained data is exported on Radiance for detailed and more accurate daylight analysis. It is pragmatic that illuminance level is varied with respect to date and time that are clearly expressed by the daily sun path and shadow range. It is also perceived that the installed artificial luminaries does not provide the required illuminance on the working plane and consume more energy. The major aim of this research is to reduce the lighting load by introducing energy efficient artificial luminaries into the room that provide the required illuminance level on the working plane. Lumen method is used to explain the energy saving which is carried out according to existing energy consumption compared with the proposed one. At the end cost comparison of energy consumption and payback period is alsocalculated. This study shows that overall cost saving in energy consumption is approximately 34.37% and the calculated payback period for the newly installed lights is comprising of approximately 11 months.

Estimation of Energy Saving in Educational Building from Day lighting to Improve the Visual Comfort