The ornamental design for a solarlamp, as shown and described.
FIG. 1 is a perspective view of a solar lamp showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof;
FIG. 9 is a perspective view of the solar lamp where the solar lamp is in a configuration of use; and,
FIG. 10 is an enlarged view of portion 10 shown in FIG. 1.
The dashed broken lines in the drawings depict portions of the solar lamp that form no part of the claimed design. The dot-dash broken lines in FIGS. 1 and 10 depict the boundaries of the enlargement and form no part of the claimed design.