The ornamental design for the lightbar enclosure, as shown and described.
FIG. 1 is a perspective view of an embodiment of a lightbar enclosure showing our new design;
FIG. 2 is a front view of the lightbar enclosure of FIG. 1; FIG. 3 is a rear view of the lightbar enclosure of FIG. 1 which is a mirror image of the front view of FIG. 2;
FIG. 4 is a left end view of the lightbar enclosure of FIG. 1;
FIG. 5 is a right end view of the lightbar enclosure of FIG. 1 which is a mirror image of the left end view of FIG. 4;
FIG. 6 is a top view, looking down at the lightbar enclosure of FIG. 1; and,
FIG. 7 is a bottom view, looking up at the lightbar enclosure of FIG. 1.
No claim is made to the portions shown in broken lines.