Abstract: A system for selective emission of therapeutic monochromatic light including a light source operable to emit light within a monochromatic wavelength range, defining a therapeutic light, the monochromatic wavelength range being associated with a physiological response in a human subject, a non-transitory computer-readable storage medium, and a controller positioned in communication with each of the non-transitory computer-readable medium and the light source and operable to receive an indication of optical characteristics of a space into which the light source is positioned to emit light, defined as a spatial optical characteristic and operate the light source to emit the therapeutic light responsive to the spatial optical characteristic.