C5Pro does have light cones.  I can't speak for C5 standard, and I don't know which you're using.  But light cones entered the Carrara blood stream back when it was still RayDream.

As for the horizontal lines in the lens shader, you can make a glow shader that uses a mixer, combining a light and dark color via the "wires" operator.  You can select  the number of horizontal or vertical lines independently, so you'd be able to make only horizontal lines appear.

As Miss Nancy said, it does take a while to learn your way around Carrara, but once you figure it out, it all does make sense!

:Dex