The ornamental design for a lighting apparatus, as shown and described.
FIG. 1 is a front view of my new and ornamental design for a lighting
apparatus; the dotted lines are illustrative of the environmental use of
the design and do not form a part of the claimed design.
FIG. 2 is a side view thereof, both sides being mirror images of one
another, the dotted lines are illustrative of the environmental use of the
design and do not form a part of the claimed design; and,
FIG. 3 is a top view thereof; the dotted lines are illustrative of the
environmental use of the design and do not form a part of the claimed
design.