FIG. 1 is a perspective view of a light fixture embodying the design of the present invention. FIG. 2 is a front side elevational view of the light fixture illustrated in FIG. 1. FIG. 3 is a left side elevational view of the light fixture illustrated in FIG. 1, with the right side elevational view being identical thereto. FIG. 4 is a back side elevational view of the light fixture illustrated in FIG. 1. FIG. 5 is a top view of the light fixture illustrated in FIG. 1; and, FIG. 6 is a bottom view of the light fixture illustrated in FIG. 1. The mounting structure shown in broken lines forms no part of the claimed design.