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A comprehensive guide to the therapeutic benefits of light and color and how they affect our physical and psychological well-being * Shares scientific research on how different wavelengths of light influence our cells, brain function, sleep patterns, and emotional stability * Examines several forms of light therapy, including chromotherapy, heliotherapy, actinotherapy, and thermotherapy * Explains how to use light and color therapy, maximize the benefits of sunlight, and avoid the health risks of new light sources such as compact fluorescents and LEDs Beginning with sun worship in prehistory and sunshine therapies in ancient Egypt, Greece, and India, light has long been associated with the sublime, the divine, and healing. Yet only recently have we begun to understand how different parts of the light spectrum, from infrared to ultraviolet, can affect our physical and psychological well-being.