The Retro Round Micro 3rd Brake Light is designed to get a driver’s attention, yet at only 2½” by ½” by 1 3/8′ it goes nearly un-noticed on the car. Tiny yes, but we’re using powerful CREE style LEDs to put out tons of bright red light. Surface mount or flush mount versions are available.
https://www.rodauthority.com/news/safety-is-a-lock-and-watsons-streetworks-is-the-key/
https://www.hotrodhotline.com/watson-street-lights-repeat-winner-nsra#.XWgeyihKiM8