We use car headlights when all other means of lighting have been exhausted DF. Flares are always considered (used them many a time, excellent lighting), however sometimes some places just don't have them. Or the owners are away and the caretaker doesn't know where they are. Or it's blowing a gale (obviously still within flying limits,
) and the use of flares would either cause the countryside to be set alight or not even be possible to get going!
There are many situations, however, we can't just use car headlights unless it's a mercy flight.
morno