Roger Long wrote:
All will be revealed he

http://home.maine.rr.com/rlma/MOB.htm

I was originally going to just attach the light to the pole with some
silicone caulking to beef up the seams but I'm trying to make the
upper part of the pole as light as possible and maximum ballast
(batteries at the bottom therefore) so that it will stand up in strong
winds.

Crew loss is most likely in rough weather so what's the point of a
pole that blows flat in the water?

Any commercially-made danbuoy I've used has had a massively heavy lump of
lead at the bottom. They do wave around a bit, but only blow flat above
force 12!

The movement helps you keep an eye on the light too.

The size and placement of the float material is critical to the stability of
course.

Dennis.