The ornamental design for a searchlight, as shown and described.
FIG. 1 is a front perspective view of a searchlight showing the design with a right filter flap in a right open position and a left filter flap in a left open position;
FIG. 2 is a top view of the searchlight showing the design of FIG. 1 with the right filter flap in the right open position and the left filter flap in the left open position;
FIG. 3 is a bottom view of the searchlight showing the design of FIG. 1 with the right filter flap in the right open position and the left filter flap in the left open position;
FIG. 4 is a right side view of the searchlight showing the design of FIG. 1 with the right filter flap in the right open position and the left filter flap in the left open position;
FIG. 5 is a left side view of the searchlight showing the design of FIG. 1 with the right filter flap in the right open position and the left filter flap in the left open position;
FIG. 6 is a front view of the searchlight showing the design of FIG. 1 with the right filter flap in the right open position and the left filter flap in the left open position;
FIG. 7 is a rear view of the searchlight showing the design of FIG. 1 with the right filter flap in the right open position and the left filter flap in the left open position;
FIG. 8 is a front perspective view of a searchlight showing the design of FIG. 1 with the right filter flap in a right closed position and the left filter flap in the left open position;
FIG. 9 is a front perspective view of a searchlight showing the design of FIG. 1 with the right filter flap in the right open position and the left filter flap in a left closed position; and,
FIG. 10 is a rear perspective view of a searchlight showing the design of FIG. 1 with the right filter flap in the right closed position and the left filter flap in the left open position.
The broken lines of FIGS. 1-10 illustrate portions of the searchlight that form no part of the claimed design.