The ornamental design for a lightingfixture, as show and described.
FIG. 1 is a bottom perspective view showing a new design for a lighting fixture;
FIG. 2 is a left-side view of the lighting fixture of FIG. 1;
FIG. 3 is a right-side view of the lighting fixture of FIG. 1;
FIG. 4 is a front view of the lighting fixture of FIG. 1;
FIG. 5 is a rear view of the lighting fixture of FIG. 1;
FIG. 6 is a top view of the lighting fixture of FIG. 1; and,
FIG. 7 is a bottom view of the lighting fixture of FIG. 1.
The dashed broken lines in FIG. 7 represent portions of the lighting fixture that form no part of the claimed design. The broken lines shown in the middle of FIGS. 1-3, 6, and 7 connected via a bracket represent indeterminate length and form no part of the claimed design.