The ornamental design for an lamp, as shown and described.
The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee.
FIG. 1 is a perspective view of a first embodiment of the lamp with a claim to the color green as shown;
FIG. 2 is left side view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is right side view thereof;
FIG. 5 is a top view thereof;
FIG. 6 is a perspective view of a second embodiment of the lamp with no claim to color;