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 shown in a first embodiment;
FIG. 2 is a bottom plan view of the light fixture in accordance with my design shown in a second embodiment;
FIG. 3 is a side elevation view of the light fixture in accordance with my design shown in the first embodiment;
FIG. 4 is an opposite side elevation view of the light fixture in accordance with my design shown in the first embodiment;
FIG. 5 is a back elevation view of the light fixture in accordance with my design shown in the first embodiment; and,
FIG. 6 is a front elevation view of the light fixture in accordance with my design shown in the first embodiment.
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.