Was wondering if anyone has any idea how to make the following bike flag led poles..

I couldn't find the material used on these ones...
I had the same idea, using some pipe with light inside and attaching it with that bracket to a wood panel of sorts
Not sure what material was used here but I do not believe that's foam...
Would also appreciate if anyone has a good tip regarding which led strip to use or how to connect that wood panel securely to the bike
Will probably be using a battery-operated one which as far as I saw only reach 2m, the rest is 12v, need a big battery which i believe will also die fast
Searched the forums, couldn't find really good support for what I am after...
Thanks for reading
