Light therapy has always been considered a healing force, and because they felt that light was the source of life, some Egyptian cults worshipped the sun and the healing ability of light. This modality was rediscovered by JH Kellogg in his "Light Therapeutics" (1910): "To be able to harness this force, to control it, and to focus it upon any desired organ or function of the body, is one of the newest and greatest triumphs of modern therapeutics.”
early twentieth century Dinshah Spectro-Chrome Metry devices by the Spectro-Chrome Institute, Malaga, New Jersey
Colonel Dinshah Ghadiali was a “metaphysician,” and President of the Spectro-Chrome Institute. According to his theories, most diseases could be treated by shining lights of differing colors and intensity on the ill and disabled. The foundation of Dinshah’s therapy rested on the assumption that colors projected on the skin can be effective in treating various diseases, both internal and external, by altering the abnormal physiology that those diseases cause.
early twentieth century violet ray cased sets
Numerous annealed glass tubes constructed under low vacuum glowed with different colors, depending on the gas within. They were designed to spark when touched and came in different shapes to treat different parts of the body for the therapy of almost any condition. (left to right) Energex by Sears, Roebuck, and Co., Renulife, model R, Renulife Electric Co., Detroit, Michigan, LifeLite, model A, Ultra-Violet Home Products, Inc., Los Angeles, California