The ornamental design for a lightfixture, as shown and described.
FIG. 1 is a perspective view of the light fixture showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a front elevational view thereof, the rear side elevational view, the right side elevational view and the left side elevational view being a mirror image;
FIG. 4 is a bottom plan view thereof;
FIG. 5 is a perspective view of a second embodiment of our new design;
FIG. 6 is a top plan view thereof;
FIG. 7 is a front elevational view thereof, the rear side elevational view, the right side elevational view and the left side elevational view being a mirror image; and,