a backlighting light fixture adapted for use in providing backlight illumination for display structures having a framework made of rail members assembled to define openings , with translucent , image bearing panels mounted in the openings . the backlighting light fixture has a reflector and lamp support portion is made of a resilient and flexible material , having an inside surface , an outside surface , and opposing side edges and top and bottom edges . a first attachment portion is attached to an inside surface of the reflector and lamp support portion . a light source is also provided , with a second attachment portion fixed thereto . the first and second attachment portions are detachably attachable together so that the light source can be detachably affixed to the inside surface of the reflector and lamp support portion . the backlighting light fixture is detachably engageable with the display structure by rearwardly bowing the outside surface of the reflector and lamp support portion carrying the light source , and engaging its side edges with the display structures so that the reflector and lamp support portion and its carried light source are securely retained in the area of the opening .