Information on Cardas Lightning 18 digital cable.

I bought a Cardas Lightning 18 digital cable to use as a connection between my Mytek Liberty DAC and my Bluesound Vault 2i, and I rather like it. It is brighter sounding than my Cardas Clear digital cable I use to connect to my Marantz SACD player, but it has a lot of punch.

My question is that I can find practically no information on this cable, like when was it produced, what was the original cost, where was it in the lineup of Lightning cables like 15, and where can I find more inf. on it?