I have them in my Aero Roger -
![[Linked Image]](https://www.tm-img.com/images/2017/11/08/2017-11-08-11.35.21.jpg)
- replaced the amber lenses with clear/white lenses and new dual bulb holders and switchback bulbs.
They are a strange American spec. bulb which were quite tricky to source (it was a few years back now

).
They operate as DRL's then flash amber as you describe.
I used a delay timer on them so that it gives the battery a fighting chance to start the car before they come on (about 50secs. from memory...)
I also have them wired via a
'Car Builder Solutions' DRL control unit -
https://www.carbuilder.com/uk/automatic-daytime-running-lights-wiring-kit and an on/off switch so they can be disabled too.....
James