Automatic Light Control Operation
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
The automatic light control system works when the light control switch is turned to AUTO. The automatic light control sensor detects the brightness around the vehicle. The system then automatically turns the taillights and headlights on if the brightness is below the set level and turns the taillights and headlights off when the surroundings become brighter than the set level.