I had an appointment before work and it was quite dark. And of course I couldn't find my stupid light. Sheesh. So I had to use a second blinkie on the front. Good streetlights where I was riding, so I wasn't too concerned about potholes but I wanted to be visible to cars of course. And I thought that if I got stopped by a cop I would argue substantial compliance blah blah blah. And then I realized that I've never seen a cop stop a cyclist for no lights, even when they've turned in front of them.