FIG. 1 is a side plan view of a first embodiment of the invention, the portion of a lamp being symmetric about a center axis;

FIG. 2 is a top plan view of the embodiment of FIG. 1;

FIG. 3 is a bottom plan view of the embodiment of FIG. 1;

FIG. 4 is a first perspective view of the embodiment of FIG. 1; and,

FIG. 5 is a second perspective view of the embodiment of FIG. 1.

The degree of transparency or opaqueness of the lens of the portion of a lamp forms no part of the claimed design. The lens of the claimed portion of a lamp may have facets, lenslets or other treatments.

The dotted lines shown in FIG. 1-2 and 4 indicate that the lens portion of the luminaire may be flat or curved.

The dash-dot-dot lines shown between the heat sink portion and base portion in FIGS. 1 and 3 indicates that the heat sink portion may be of any length.

The phantom lines shown in FIGS. 1 and 3 are environmental and not part of the claimed design.

The color and shading of the portion of a lamp forms no part of the claimed design, the portion of a lamp according to the claimed design may be any color or combination of colors.

The surface treatment of the portion of a lamp forms no part of the claimed design, the portion of a lamp of the claimed design may have any surface treatment.

References to “side”, “top”, “front” and “bottom” in the figure descriptions are not meant to require certain in-use orientation; a luminaire according to the claimed design may be used in any orientation.