The ornamental design for a tentstake with illumination, as shown and described.
FIG. 1 is a perspective view of a tent stake with illumination of the claimed invention.
FIG. 2 is a front side elevation view of the tent stake with illumination of FIG. 1.
FIG. 3 is a back side elevation view of the tent stake with illumination of FIG. 1.
FIG. 4 is a right side elevation view of the tent stake with illumination of FIG. 1.
FIG. 5 is a left side elevation view of the tent stake with illumination of FIG. 1.
FIG. 6 is an enlarged top plan view of the tent stake with illumination of FIG. 1; and,
FIG. 7 is an enlarged bottom plan view of the tent stake with illumination of FIG. 1.
The contour of the visible surface of the top facing portion of the battery cover, depicted with shading lines in FIG. 1 and FIG. 6, is identical to the contour of the visible surface of the bottom facing portion of the battery cover depicted with shading lines in FIG. 7. The broken lines are for illustrative purposes only and form no part of the claimed design.