FIG. 1 is a perspective view of a lamp base comprising the new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a front view of a second embodiment of a lamp base comprising the new design, shown having indeterminate height;

FIG. 5 is a front view of a third embodiment of a lamp base comprising the new design, shown having an opaque surface;

FIG. 6 .is a perspective view of a fourth embodiment of a lamp base comprising the new design;

FIG. 7 is a top plan view thereof;

FIG. 8 is a front view thereof;

FIG. 9 is a front view of a fifth embodiment of a lamp base comprising the new design, shown having indeterminate height; and,

FIG. 10 is a front view of a sixth embodiment of a lamp base comprising the new design, shown having an opaque surface.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed invention.