Being a bit paranoid since an accident two years ago, I added a headlight modulator to hopefully increase my visibility. Today, at a busy intersection waiting to turn right, a car pulled right in front of me from the oncoming lane. As it turns out, it was someone I know. We were also headed to the same place and, when we had parked, I thanked him (!) for cutting in front of me. He responded that he thought I was flashing my lights to tell him to go ahead of me. He's actually a pretty nice guy, and so I thought about what he had said. The particular intersection is difficult to make a left hand turn, and one can sometimes have to wait for another light cycle if no one lets them turn. I can see how he understood my lights flashing at him. I'm now rethinking the use of the headlight modulator. To some it's aggravating, but if it's at all likely to be misunderstood, maybe it's not such a great safety addition.