Flying up and down the east coast, even on a moonless night - enough external lighting to not warrant calling it IF time.
Flying out around western Qld, on a moonless night, when you can't see ****, then how could you not justify that as being IF? Maybe someone from CASA needs to come flying with me sometime and tell me exactly what I'm supposed to be looking at outside. But they couldn't possibly do that, because it'd mean working after 5pm.
morno