FIG. 1 is a perspective view of a lighting fixture showing our new design;

FIG. 2 is a front view thereof, the rear view being a mirror image of the front view;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is an enlarged cross-sectional view taken along line 7-7 in FIG. 3;

FIG. 8 is an enlarged view of an indicated portion in FIG. 7; and,

FIG. 9 is an enlarged view of another indicated portion in FIG. 7.

The portions shown in double cross-hatched lines in FIG. 7 are transparent. The broken lines shown in the drawing disclosure illustrate unclaimed portions of the lighting fixture and form no part of the claimed design.