The ornamental design for a lightfixture, as shown and described.
FIG. 1 is a top perspective view of a light fixture showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a left view thereof;
FIG. 5 is a right view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is an enlarged view of the portion shown in FIG. 1.
The broken lines shown in the figures represent portions of the light fixture that form no part of the claimed design.
The light fixture is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.