You can check out www.classicarchery.com they produce a fiber pin in sizes .010, .019, .029... I find they are plenty bright for me without produceing a halo effect..... I find them comparable in brightness to the Toxonics Fibers on their hunting sights.
When I shoot 3D Competion with my scope I use the Classic Scope with the .019 fiber single pin... seems to work extremely well for3D for me.
For Hunting I am using the Toxonics line of Hunting Sights and some 3D Comp as well.