"Interior illumination" refers to the lighting inside a space or building, such as in a room or house. It refers to the type of light used and the way it brightens and enhances the atmosphere inside. Full definition
The blue interior illumination and chrome finish around gear knob lever tip add to the overall appeal. (auto.ndtv.com)
The glass - front cabinets bring light in the form of reflection and through interior illumination. (comfortandluxury.blogspot.ru)
The blue LED Interior Illumination provides an upscale and aesthetically pleasing touch to your interior with a soft glow of light in the driver and passenger footwells. (automobiles.honda.com)