This book has been designed for graduate students of basic or applied sciences having Renewable Energy as a paper. The researchers who want to pursue their research on any aspect of daylight harvesting may get a systematic understanding of the subject. The book has been written in very lucid language. It is conveniently divided into four chapters. First chapter gives an introduction of the concept behind daylight harvesting. The second chapter deals with comparison of traditional and modern buildings in terms of daylight performance. For dissemination of any technology the cost benefit analysis is a must. The third chapter deals with the design and financial aspects of daylighting in day occupancy buildings. The epilogue emphasizes the key issues involved in designing and implementing daylighting systems. The concept of daylight harvesting needs to be adopted by Energy engineers, architects, civil and illumination engineers, environmentalists, builders, township developers, planners and public at large.