The ornamental design for a lightingfixture, as shown and described.
FIG. 1 is a perspective view from above of the lighting fixture;
FIG. 2 is a perspective view from below of the lighting fixture of FIG. 1, the details of the underside of the fixture being shown in broken lines;
FIG. 3 is a right-side elevation of the lighting fixture of FIG. 1, the left-side elevation view being a mirror image thereof;
FIG. 4 is a bottom plan view of the lighting fixture of FIG. 1, the details of the underside of the fixture being shown in broken lines;
FIG. 5 is a top plan view of the lighting fixture of FIG. 1;
FIG. 6 is a front elevation of the lighting fixture of FIG. 1;
FIG. 7 is a rear elevation of the lighting fixture of FIG. 1;
FIG. 8 is a perspective view from above of a second embodiment of the design of FIG. 1, the only difference being in shorter proportional size of the finned portion; and,
FIG. 9 is a perspective view from above of a third embodiment of the design of FIG. 1, the only difference being in longer proportional size of the finned portion.
The broken lines illustrate unclaimed portions of the lighting fixture and environmental structure that forms no part of the claimed design.