This was an accidental snapshot that turned out a rather cool effect! It was a wet night on the Avenue des Champs-Élysées in Paris (you can see the Arc de Triomphe in the background).
The oncoming car headlights sparkled like diamonds and the car brake lights moving away, caution with erratic red. The streetlights and traffic lights add more dazzle to the photo.
Prompt: Daily Post Weekly Photo Challenge, Word: focus