The ornamental design for a lightfixture, as shown and described.
FIG. 1 is a bottom perspective view of a portion of a light fixture showing my new design;
FIG. 2 is a top perspective view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a side elevational view thereof, the other side being a mirror image; and,
FIG. 6 is an enlarged end elevational view thereof.
FIGS. 1–5 are broken away to indicate that the length of the design is non-specified. The broken line representation of extended portions of a lighting fixture are shown in FIGS. 1 and 2 for illustrative purposes only and form no part of the claimed design. The broken square boundary lines shown in FIGS. 2 and 4 indicate the bounds of my claimed design.