Whether it's natural daylight, electric light, the light from a fire or the glow from the screens of our electronic devices, all the types of light you are exposed to can have an impact on your health and wellbeing. Discover what light actually is, how it works and just how it can affect you, and how to bring quality light into your life and enjoy the many benefits.Swedish expert Karl Ryberg unravels the science surrounding light and offers pr...
CHF 28.90