FIG. 1 is a front elevational view of a globe for a warning light showing our new design; FIG. 2 is a rear elevational view thereof; FIG. 3 is a left side elevational view thereof; FIG. 4 is a right side elevational view thereof; FIG. 5 is a top plan view thereof; FIG. 6 is a bottom plan view thereof; FIG. 7 is a perspective view taken from the front, top and right side thereof; and, FIG. 8 is a perspective view taken from front, bottom and right side thereof.