Lighting assembly with adjustable light output

A lighting assembly, comprising:

• a first light guide comprising opposed inner and outer major surfaces between which light propagates by total internal reflection, a light input edge, and a light output region associated with an optical characteristic;
• a second light guide comprising opposed inner and outer major surfaces between which light propagates by total internal reflection, a light input edge, and a light output region associated with an optical characteristic, the inner major surface of the second light guide juxtaposed and conforming to the inner major surface of the first light guide;
• and
• a light source located adjacent the light input edges, the light source and the light input edges variably positionable relative one another to selectively apportion light between an amount of light input into the first light guide and output from the light output region of the first light guide and an amount of light input into the second light guide and output from the light output region of the second light guide so that a characteristic of the light output from the lighting assembly is modified based on the optical characteristics associated with the light output regions and the relative positioning of the light source and the light input edges.