The ornamental design for a lightfixture, as shown and described.
FIG. 1 is a first perspective view of a light fixture showing our new design;
FIG. 2 is a second perspective view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a top view thereof;
FIG. 5 is a front view thereof; wherein the rear view is a mirror image of FIG. 5; and,
FIG. 6 is a side view thereof wherein the alternate side view is a mirror image of FIG. 6.
The even-length break lines are imaginary lines and designate that indeterminate length is claimed. The even-length broken lines immediately adjacent to the shaded area represent unclaimed boundaries of the design. The even-length broken lines showing the remainder of the light fixture are for environmental purposes only and form no part of the claimed design.