We claim the ornamental designs for a lighting fixture, as shown and described.
FIG. 1 is a front/left/top perspective view of a lighting fixture. The lighting enclosure has six-way, sixty degree overall rotational symmetry. The adjustment nut has six-way, sixty degree overall rotational symmetry. The base has a circular horizontal cross section.
FIG. 2 is a front/left/top perspective view of a lighting fixture. The lighting enclosure has six-way, sixty degree overall rotational symmetry. The adjustment nut has six-way, sixty degree overall rotational symmetry. The base has a circular horizontal cross section; and,
FIG. 3 is a front/left/top perspective view of a lighting fixture. The lighting enclosure has six-way, sixty degree overall rotational symmetry. The adjustment nut has six-way, sixty degree overall rotational symmetry. The base has a circular horizontal cross section.
The broken lines shown in the drawing are for illustrative purposes only and form no part of the claimed design. Additionally, the rear surfaces of the lighting enclosure of FIGS. 1-3, which are not visible in FIGS. 1-3, are also disclaimed.