FIG. 1 is a front view of an arc tube for a high intensity discharge lamp of the present invention, wherein the rear, top, and bottom views are mirror images thereof;
FIG. 2 is a right side view thereof, wherein the left side view is a mirror image thereof;
FIG. 3 is a front view of the arc tube for a high intensity discharge lamp of FIG. 1 shown in an environmental use;
FIG. 4 is a is a rear view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a bottom view thereof;
FIG. 7 is a left side view thereof; and,
FIG. 8 is a right side view thereof.
The ornamental design which is claimed is shown in solid lines in the drawings. Any broken lines in the drawings are for illustrative purposes only and form no part of the claimed design.