in one configuration , a gauge of an instrument cluster may have a base structure with an integrally molded dial structure and a separate , attached dial structure . a transparent area of the base structure may pass light from one side of the base structure to another side . this provides the ability to supply backlighting and floodlighting to the gage structure with just a single led . the separate dial structure may be translucent to provide floodlighting or to supply light to graduations . relative to a gauge pointer , inboard indicia in one dial structure denote vehicle speeds , while outboard graduations in another dial structure demark the indicia . the transparent portion of the base structure may be an integrally molded horizontal , angular or vertical portion within the base structure . multiple levels and angles of the gauge provide a viewed component that is aesthetically pleasing and soothing to a viewer &# 39 ; s eyes .