The ornamental design for a beaconlight, as shown and described.
FIG. 1 is an isometric front view of a beacon light showing the new design;
FIG. 2 is a front view of the design of FIG. 1;
FIG. 3 is a right side view of the design of FIG. 1;
FIG. 4 is a left side view of the design of FIG. 1;
FIG. 5 is a top view of the design of FIG. 1;
FIG. 6 is a bottom view of the design of FIG. 1;
FIG. 7 is a back view of the design of FIG. 1; and,
FIG. 8 is an isometric bottom view of the design of FIG. 1.
The broken line showing of elements in FIGS. 1-8 is included for the purpose of illustrating, portions of the “article” and forms no part of the claimed design.