A combined concealed surveillance camera and photosensor control system is contained in an outer housing of predetermined configuration and dimensions to replace the existing light sensor or photosensor control unit of a public, commercial, or residential lighting fixture, replacing the function of the existing control unit in turning the lighting fixture on and off based on detected ambient light level, and also providing a concealed surveillance camera system drawing power from the lighting fixture power supply so that the camera is on continuously while the lighting fixture is turned on and off based on the detected ambient light level.