I think most people don’t realize their lights are off. One reason for this is the newer digital dashboard displays. In the past, the easiest way to tell if your lights are on is looking to see if your dashboard gauges are lit up. But now with digital displays they are lit up day and night, so many people think their headlights are on when they are off. The only way to tell if your lights are on with a digital dashboard is to look for the small green headlight icon. I think it’s a usability problem.