Toyota 2015 Prius Owner's Manual page 280

2-3. Operating the lights and windshield wipers
Automatic headlight leveling system (if equipped)
■
The level of the headlights is automatically adjusted according to the number
of passengers and the loading condition of the vehicle to ensure that the
headlights do not interfere with other road users.
Customization
■
Settings (e.g. light sensor sensitivity) can be changed.
(Customizable features
NOTICE
To prevent 12-volt battery discharge
■
Do not leave the lights on longer than necessary when the hybrid system is
off.
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