What does the 'a' on the headlight indicate?

[LaJosiah]

The 'a' on the high beam indicator represents the auto headlight function. Auto headlights automatically turn on when ambient light dims during driving and turn off when it brightens. This is a photosensitive control system installed for headlights. On the dashboard, the high beam symbol shows straight light projection lines without tilt, while the low beam symbol shows downward-angled projection lines. Relevant information about vehicle lights: 1. Introduction: Vehicle lights refer to the lamps on a vehicle, serving as illumination tools for nighttime road driving and signaling devices for various driving indications. 2. Reverse lights: Reverse lights automatically activate when the driver shifts into reverse gear. These white transparent lights primarily serve to alert following vehicles that the car is reversing.