Here's the video I mentioned above. LED discussion starts at about 2 minutes in.
https://youtu.be/W57ACZws8-g
The video was made for another fellow who was restoring this same kind of boat.
Girls will notice too and their fathers. Decent girls are not turned on by this as much as you might think. But I guess you're just trying to impress you drinking buddies. I suggest different friends myself.
I don't think it's Alumacraft or Cadillac. Try Wolverine or Feathercraft. Lots of aluminum boat manufacturers trying to convert from post war airplane building to something else.
Some of the smaller vintage trailers use round tubes. I'm looking for one in Minnesota. If yours fits this bill, try selling it to someone like me, but in Colorado, and then buy one that works better. I'm just trying to protect some vintage stuff...