The ornamental design for lighting assembly, as shown and described.
FIG. 1 is a bottom perspective view of lighting assembly showing my new design;
FIG. 2 is a bottom view thereof;
FIG. 3 is an enlarged view of a central portion of the design defined by lines 3-3 of FIG. 2;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a front view thereof;
FIG. 7 is a rear view thereof; and,
FIG. 8 is a top view thereof.
The lighting assembly is symmetrical about its longitudinal center plane. The broken line showing of the remainder of the lighting assembly represents unclaimed subject matter and forms no part in the claimed design.