FIG. 1 is a perspective view of a solar lamp showing my design;
FIG. 2 is a front elevational view of the solar lamp with the rear elevation being identical thereto;
FIG. 3 is a left side view of the solar lamp with the right side elevation being identical thereto;
FIG. 4 is a top plan view of the solar lamp; and,
FIG. 5 is a bottom plan view of the solar lamp.
The broken lines showing a pole for the solar lamp are for illustrative purposes only and form no part of the claimed design.