The light we receive every day has a huge impact on our brain, mood and health, but we still tend to pay too little attention to the quality of lighting. We wake up in the dark, flip the switch, go to work, and spend hours sitting in front of computer monitors, day after day, not noticing errors in our handling of light. We complain about headaches, bad mood, blurred vision and melancholy in winter, but we rarely really think about what role light plays in all this... In this book, translated into several languages, authoritative Swedish expert Carl Ryberg, a specialist in psychology, photobiology, light therapy and architecture explains how light affects our eyes and well-being and how to make lighting better. The latest scientific research combined with practical advice can help you optimize the use of natural and artificial light, minimize exposure to light pollution and screen light, normalize the body's circadian rhythm (including light rituals for better sleep), effectively use light therapy and eye yoga - and means putting all the benefits that light gives us at the service of our health.