Abstract: A system for apparel-related and other illumination includes an electro-luminance portion defining a graphic image having regions of differing optical transmissibility, the electro-luminance portion further configured to removably join to a back surface of a garment or pendant related to the graphic image; a housing configured to removably join to a back side of the electro-luminance portion; and a processor contained within the housing, the processor configured to control functions of the electro-luminance portion, the processor including elements for controlling a level of luminosity of the electro-luminance portion in correlation to changes in levels of ambient sound.