It is quiet common for
fish to be attracted to luminous,bright or sparkly things.
The whole idea with
luminous beads is not to catch the fish on the bead it is just to get
the fish by your bait.
They may swim right up
to your bead just to have a look and then think to them selves "this
is just a plastic bead" but when that bead is by your bait you
can bet they are going to have a go at your bait now they know it's
there!
More information