FIG. 1 is a bottom plan view of a lamp showing the design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a perspective view thereof;
FIG. 4 is a perspective view thereof, slightly rotated as compared to FIG. 3;
FIG. 5 is a side elevation view thereof;
FIG. 6 is a side elevation view thereof, slightly rotated as compared to FIG. 5;
FIG. 7 is a side elevation view thereof, slightly rotated as compared to FIG. 6;
FIG. 8 is a bottom plan view of another embodiment of a lamp showing the design;
FIG. 9 is a top plan view thereof;
FIG. 10 is a perspective view thereof;
FIG. 11 is a perspective view thereof, slightly rotated as compared to FIG. 10;
FIG. 12 is a side elevation view thereof;
FIG. 13 is a side elevation view thereof, slightly rotated as compared to FIG. 12;
FIG. 14 is a side elevation view thereof, slightly rotated as compared to FIG. 13;
FIG. 15 is a bottom plan view of another embodiment of a lamp showing the design;
FIG. 16 is a top plan view thereof;
FIG. 17 is a perspective view thereof;
FIG. 18 is a perspective view thereof, slightly rotated as compared to FIG. 17;
FIG. 19 is a side elevation view thereof;
FIG. 20 is a side elevation view thereof, slightly rotated as compared to FIG. 19;
FIG. 21 is a side elevation view thereof, slightly rotated as compared to FIG. 20;
FIG. 22 is a bottom plan view of another embodiment of a lamp showing the design;
FIG. 23 is a top plan view thereof;
FIG. 24 is a perspective view thereof;
FIG. 25 is a perspective view thereof, slightly rotated as compared to FIG. 24;
FIG. 26 is a side elevation view thereof;
FIG. 27 is a side elevation view thereof, slightly rotated as compared to FIG. 26; and,
FIG. 28 is a side elevation view thereof, slightly rotated as compared to FIG. 27.
The portions of the lamp shown in broken lines form no part of the claimed design.