If anyone is following this thread, I have learned a few answers that I'll share.
Cardas replaced Clear Light - not with Sky, as I wrongly assumed, but with Clear Cygnus. Cygnus is similar to Light but with some added richness and better bass, and occupies the same price point. The Sky is a newer offering at a much lower price point, coinciding with their Sky speaker cable, and fills a spot in their lower-mid-line.
Although I still have not heard detailed comparisons, I suspect the Clear Light was very similar to the older Neutral Reference, which I do know from experience sounded very clear but lacked some richness and involvement. That description reflects what Cardas wanted/needed to improve in Light, thus the Cygnus was developed.
I'd still be very interested to hear from those who might have experience with what these cables bring to the table from a sonic perspective. I suspect Sky is similar to, but improves upon, the older Cross interconnect. Whereas the Cygnus may be closer to the older Golden Reference?
