The ornamental design for a lightfixture, as shown and described.
FIG. 1 is a front perspective view of a light fixture;
FIG. 2 is a front elevation view thereof; the rear elevation view being a mirror image thereof;
FIG. 3 is a left side elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken lines shown in the drawings depict portions of the light fixture that form no part of the claimed design.
The base shown in FIGS. 1-3, 5 and 6 of the drawings are shown broken away to indicate indeterminate length, it being understood that the base a uniform shape and appearance throughout its length.