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 the first embodiment;
FIG. 3 is a side elevation view of the light fixture in accordance with my design shown in the first embodiment, the opposite side view being a mirror image therof; and,
FIG. 4 is a bottom plan view of the light fixture showing a second embodiment thereof, the only difference being the position of the support bars on the round mounting plate, it being understood that all other surfaces are the same as those of 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.