Lighting Device

FIG. 1 is a top perspective view of a lighting device showing the new design; FIG. 2 is a bottom perspective view thereof; FIG. 3 is a front elevational view thereof; FIG. 4 is a rear elevational view thereof; FIG. 5 is a side elevational view thereof; FIG. 6 is an opposite side elevational view thereof; FIG. 7 is a top plan view thereof; and, FIG. 8 is a bottom plan view thereof. The broken lines in the figures illustrate portions of the design that form no part of the claimed design. The shading on the lighting device is provided merely to represent contours of the design and does not connote the character of the surfaces such as any specific texture, material, gloss, translucence, transparency, surface treatment, or surface decoration.