The availability of electric lighting has changed the lives of people the world over, and lighting is a major consumer of energy. This book is a comprehensive review of the interaction of people and lighting and surpasses the author's classic first edition. The technology has changed markedly in recent years with the introduction of new light sources and new methods of light distribution and because the significance of specialist lighting applications is now better understood. The second edition includes new and updated information to help readers understand the forms of lighting that can alter human visual capabilities and enhance productivity, ensure comfort, and create appropriate lighting conditions.