Light therapy: going back to ancient times, Chinese, Indian, and Tibetan Ayurvedic practitioners have known about the benefits of color and light therapy. This natural, holistic approach to well-being has been used in healing the physical, emotional, mental, and spiritual body for thousands of years. In simple terms, color, being a property of light, is a living energy, and an essential part of all life (without light, all life on earth would die.) Different wavelengths of light produce different colors, and thus have different beneficial effects. Treatments cover health problems ranging from headaches and colds to depression and insomnia.