John Ott was an American photographer and researcher. He was hired by Walt Disney to produced a series of shorts of flowers dancing using light and humidity. In doing so, he noticed that the light would drastically affect the growth, development, and daily rhythms of the flowers. He began studying the health effects of light on animals and and found that different colors would affect the ratio of males to females born, among many other processes. He was one of the first modern researchers to make clear the importance of full-spectrum light, including infrared and ultraviolet, for proper biologic function and optimal health, in his book, Health and Light.