The ornamental design for a headlight for bicycles, as shown and described.
FIG. 1 is a front view of a headlight for bicycles showing the new design;
FIG. 2 is a rear view of the headlight for bicycles;
FIG. 3 is a left side view of the headlight for bicycles;
FIG. 4 is a right side view of the headlight for bicycles;
FIG. 5 is a top view of the headlight for bicycles;
FIG. 6 is a bottom view of the headlight for bicycles; and,
FIG. 7 is a perspective view of the headlight for bicycles.
The broken line showing of certain portions of the headlight for bicycles are included for the purpose of illustrating only and forms no part of the claimed design.