The electromagnetic environment has a great amount of influence on the existence of life and man. The main points of concern are--(1) that sea-level solar radiation is biologically beneficial and necessary for man's physical and mental health, (2) that urban man has inadequate exposure to certain wavelengths of ultraviolet light normally received from sunlight, and (3) that man has created an electromagnetically polluted environment that is potentially harmful to life. Data references and observations supporting the above statements indicate that man must be concerned with creating a biologically optimum electromagnetic environment. To achieve this, the author cites a need for the creation of a profession called spectrum engineering, which would be primarily concerned with electromagnetic radiation and its biological effects on life. An important aspect of this concept is "bio-lighting", an artificial light source that would produce a quality of light the approximate equivalent of sunlight found at sea-level. A listing of the effects of various wavelengths of solar radiation on life, and a list of references, are appended. (JD)