The ornamental design for a lighting apparatus, as shown and described.
FIG. 1 is a perspective view of a lighting apparatus showing my new design.
FIG. 2 is a top plan view thereof.
FIG. 3 is a bottom plan view thereof.
FIG. 4 is a front elevational view thereof.
FIG. 5 is a rear elevational view thereof.
FIG. 6 is a right side elevational view thereof.
FIG. 7 is a left side elevational view thereof; and,
FIG. 8 is cross-sectional view taken through line VIII-VIII of FIG. 6.
The area denoted by cross-hatching in FIG. 8 is formed from a transparent or translucent material and the small circular-like elements shown therein are cavities or voids formed in the transparent or translucent material.
The broken line showing of the internal structure in FIG. 8 is for environmental purposes only and forms no part of the claimed design.