FIG. 1 is a perspective view of my new coachlight design; FIG. 2 is a top plan view of the coachlight of FIG. 1; FIG. 3 is a front elevation view of the coachlight of FIG. 1; FIG. 4 is a right side view of the coachlight of FIG. 1; and, FIG. 5 is a bottom plan view of the coachlight of FIG. 1.