Alexander Wunsch is physician, inventor, researcher and teacher in the field of holistic medicine and photobiology. In his private medical practice in Heidelberg, he uses the Spectro-Chrome chromotherapy system in combination with electromagnetic fields and body sound application, Cranio-Sacral bodywork, Acupunture and Luscher Color Diagnostic. His research focuses on light effects on cellular level, photoendocrinology and toxic light effects caused by artificil light sources. He developed a number of devices for electromagnetic medicine, chromotherapy and electromagnetic environment testing. Alexander Wunsch holds a lectureship for “Light & Health” at the University of Technology, Business and Design in Wismar (Germany) and is the CEO of Medical Light Consulting in Heidelberg.