We claim the ornamental design for a safety vest with back light, as shown and described.
FIG. 1 is a perspective view of the rear of a safety vest with back light, showing our new design;
FIG. 2 is a perspective view of the rear of the safety vest with back light from an upper angle;
FIG. 3 is a front view of the safety vest with back light;
FIG. 4 is a rear view of the safety vest with back light;
FIG. 5 is a side elevation view of the safety vest with back light from the left side;
FIG. 6 is a side elevation view of the safety vest with back light from the right side; and,
FIG. 7 is a perspective view of the front of the safety vest with back light from a lower angle.
The dotted grid pattern represents a mesh material. The two styles of stippling, on the rear center vertical stripe of the vest and the underside of the back light in FIGS. 5 and 6, represent contrasting appearance.
The broken lines in FIG. 1 depicting a wearer represent environmental subject matter that forms no part of the claimed design. The remaining broken lines in the figures depicting lines of stitching represent portions of the safety vest with back light that form no part of the claimed design.