FIG. 1 is a perspective view of a lighting device showing my new design, as viewed from the top and one side.

FIG. 2 is a bottom plan view of the lighting device of FIG. 1.

FIG. 3 is a first side elevation view of the lighting device of FIG. 1.

FIG. 4 is a back elevation view of the lighting device of FIG. 1.

FIG. 5 is a front elevation view of the lighting device of FIG. 1.

FIG. 6 is a second side elevation view of the lighting device of FIG. 1.

FIG. 7 is a top plan view of the lighting device of FIG. 1.

FIG. 8 is a top plan view of the lighting device of FIG. 1 with the light bars fully rotated in a first direction; and,

FIG. 9 is a top plan view of the lighting device of FIG. 1 with the light bars fully rotated in a second direction.

The details shown in broken lines illustrate portions of the lighting device that form no part of the claimed design.