US D657088 S1
The ornamental design for a lamp, as shown and described.
FIG. 1 is a top perspective view of the lamp showing my design;
FIG. 2 is a bottom perspective view thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a right view thereof, the left side being identical; and,
FIG. 6 is a bottom view.