Daylight Harvesting System: A Review on Light Harvesting Technologies in Commercial Buildings

This article presents key energy use figures and explores the energy saving potential for day lighting in office buildings based on a review of relevant literature. The paper contains different ways in which the natural daylight can be made use of, thus reducing the use of artificial lighting. A comprehensive study regarding the day lighting and artificial lighting shows that Electric lighting accounts for 20% of the total primary energy consumed by commercial buildings in the U.S. Over the entire U.S. building sector, lighting accounts for more than 14% of the total primary energy consumed. Consequently, reducing lighting energy consumption presents a potential for considerable energy consumption reduction across the building sector. One effective approach to reduce the use of electric lighting is daylight harvesting. It is due to this reason that the use of daylight for daily illumination in place of artificial lighting also contributes for the concept of GREEN BUILDING, thus inhibiting higher economy of the country.