The ornamental design for a lightingfixture, as shown and described.
FIG. 1 is a front perspective view of a lighting fixture. The canopy and shades each have a square horizontal cross-section.
FIG. 2 is a left side elevational view of the lighting fixture of FIG. 1, shown with the upper stem sectioned to allow for an enlarged view of the lamps and the lamp supporting frame.
FIG. 3 is a front elevational view of the lighting fixture of FIG. 1, shown with the upper stem sectioned to allow for an enlarged view of the lamps and the lamp supporting frame; and,
FIG. 4 is a top plan view of the lighting fixture of FIG. 1.
The broken lines shown on the drawings depict portions of the lighting fixture that form no part of the claimed design.