Toyota 2012 Prius Owner's Manual page 327

Type B
■
Fog lights can be used when
The headlights are on in low beam.
NOTICE
■
To prevent 12-volt battery discharge
Do not leave the lights on longer than necessary when the hybrid system is
off.
PRIUS PHV_OM_OM47818U_(U)
2-3. Operating the lights and windshield wipers
Turns the fog lights
off
Turns the fog lights
on
2
299