The ornamental design for a stringlamp, as shown and described.
FIG. 1 is a perspective view of a string lamp showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a left side view thereof;
FIG. 5 is a right side view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is an enlarged view of the selected portion in FIG. 1.
The broken lines shown in the drawings depict portions of the string lamp in which the design is embodied that form no part of the claimed design. The broken lines of alternating length shown in FIGS. 1 and 9 are for the purpose of illustrating the boundaries of the enlarged fragments shown in FIG. 9 and form no part of the claimed design. The string lamp is shown with symbolic breaks in its length and the appearance of any portion of the string lamp between the pairs of break lines, or beyond the single break line, forms no part of the claimed design.