FIG. 1 is a right-top perspective view of a cap having an illumination module with a plurality of illuminating elements;

FIG. 2 is a front view of a cap having an illumination module with a plurality of illuminating elements;

FIG. 3 is a left-top perspective view of a cap having an illumination module with a plurality of illuminating elements;

FIG. 4 is a top view of a cap having an illumination module with a plurality of illuminating elements;

FIG. 5 is a bottom view of a cap having an illumination module with a plurality of illuminating elements;

FIG. 6 is a rear view of a cap having an illumination module with a plurality of illuminating elements;

FIG. 7 is front perspective view of a cap having an illumination module with a plurality of illuminating elements;

FIG. 8 is a right perspective view of an illumination module;

FIG. 9 is a left side view, of which the right side view is a mirror image of an illumination module;

FIG. 10 is a rear view of an illumination module;

FIG. 11 is a front view of an illumination module;

FIG. 12 is a top view of an illumination module; and,

FIG. 13 is a bottom view of an illumination module.

The broken lines that occur on either side of the gore seams, on the edges of the size adjustment opening and strap, the headband and the bias tape, as well as the six rows of broken lines that run along the edge of the visor, represent stitching and are part of the claimed design. The broken lines drawn with a shorter, finer segment in FIGS. 5 and 6 illustrate environmental matter and form no part of the claimed design.