The ornamental design for a lightfixture, as shown and described.
FIG. 1 is a perspective view of a light fixture in accordance with my design;
FIG. 2 is a top plan view of the light fixture in accordance with my design;
FIG. 3 is a bottom plan view of the light fixture in accordance with my design;
FIG. 4 is a front elevation view of the light fixture in accordance with my design, the rear elevation view being substantially identical thereto; and,
FIG. 5 is a side elevation view of the light fixture in accordance with my design, the other side elevation view being substantially identical thereto.
The portions of the light fixture shown broken away in FIGS. 1 and 4-5 are to depict nonspecific length.
The broken-line disclosure of elements is understood to represent portions of the article in which the design is embodied, but which form no part of the claimed design.