For vehicles with HID (High Intensity Discharge) headlights, the joint between the headlight lens and the housing does not have an appropriate structure, and therefore, the bonnet rubber seal may push the lens, and this may cause the sealing material between the lens and the housing to partially peel off. If this occurs, water may enter the inside of the headlight, and in the worst case, water could enter the inside of the control unit and cause a short circuit, in which case the headlight will fail.