Yep, it's just simple tube with reflection on fresnel IOR higher than 4,00 and one little planar light source. As alternative, there is also plane with CoronaLightMtl just to test two different light sources. And this additional plane is also useful to export it with rest of scene as OBJ to Kerkythea 2008 engine.
All was rendered on Core 2 Quad Q9300 @ 2.50 GHz
There is a scene file.