Best filament for conducting light

I need to design a housing that basically is a series of light pipes. Is there a filament material that’s suitable for that?

Nylon T-glass is probably best. It isn’t available yet though:

http://taulman3d.com/t-glase-features.html

Actually it is PETT (polyester) not nylon, and it is available in 1.75mm diameter but not yet available in 3mm. This stuff is pretty amazing.

it’s not?

http://taulman3d.com/buy-t-glase-3mm.html

My bad! And so it is…