When planning buildings in which people are to work and live, the efficient use of natural daylight and solar energy is increasingly important. The challenge is to compensate the different lighting requirements in winter and summer. Integrated daylight deflection systems distribute light into the interior of buildings, utilize and store solar energy to save artificial lighting, air-conditioning and heating costs. Extensively researched and impressively illustrated with a large number of computer simulations and photographs of built examples, this volume is more than an introduction to the basic principles, functions, designs and calculation methods of advanced light-guidance technology for architects, lighting designers, building and climate engineers. In particular it provides detailed documentation of the new Retro-Technology systems, explaining the role they can and do play in integrated façade and building design and planning processes.