I wanted to test RF2's time acceleration feature in the Session Settings. So I set it for x20. This makes the time in the environment pass 20 times faster than reality, so if you drive for two hours you do so over 20 hours of environment time (e.g. morning, daytime, evening, night, etc.). Anyway, it was some time around 9 p.m. at Le Mans_17. It was light enough to see, I thought, when I suddenly got a black flag message for driving in the dark without my headlights. I didn't care because I was just testing the feature, but it seems like having the crew chief warn you would be nice. You don't get any warning...just the black flag and then it's too late to do anything.