Information on the influences of light on biological processes, and how these processes are thwarted by different types of disturbance of the natural solar radiation. The author reports on biological effects on plants, animals and man. Interesting information for anyone seeking to improve their own health, or those interested in medicine, biology and physics. The information has widespread implications and a potential to benefit product development in lighting / glazing / sun protection and the design of homes and medical facilities, to mention a few. It`s a technical book about scientific findings, but is easy to read, funny and wildly interesting. A book that suggests some easy changes you can implement in your everyday life today, along with others that require some more thought and planning.