High beam indicator light
Subaru Impreza / Subaru Impreza Owners Manual / Instruments and controls / Warning and indicator lights / High beam indicator light

This light shows that the headlights are in the high beam mode.
This indicator light also illuminates when the headlight flasher is operated.
See also:
Non-turbo models
The engine is designed to operate using
unleaded gasoline with an octane rating
of 87 AKI (90 RON) or higher. ...
Operation
The SRS side airbag and SRS curtain airbag can function only when the ignition
switch is in the “ON” position.
The driver’s and front passenger’s SRS side airbags and SRS curtain airbags deploy
...
ON
This is the normal operating position after the engine is started. ...
