an output reflective layer located on the output surface to partially reflect light toward the input surface and partially allow light to pass through the output reflective layer and the output surface, with {HEAD ~ the reflectance} of the output reflective layer being graded across the length of the beam directing member to produce less reflection as the reflective layer extends away from {TAIL ~ the light entering region}; and 
an output reflective layer located on the output surface to partially reflect light toward the input surface and partially allow light to pass through the output reflective layer and the output surface , with { HEAD ~ the reflectance } of the output reflective layer being graded across the length of the beam directing member to produce less reflection as the reflective layer extends away from { TAIL ~ the light entering region } ; and
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