Hi Benisse. No, I don't know Lux Aeterna, and for some reason the link you gave me doesn't work.
I'll try to find it some other way.
Wow, your son will perform at Carnegie Hall!! That's really exciting. Only the best perform there. And some of the rest of us, if we're very lucky.
I have been there as well with 300 other singers, and with an Icelandic conductor. We performed Mendelssohn's Elijah, an Oratorium for soloists, choir and orchestra. That was a great, once-in-a-lifetime experience.
I'll pray for your son, that he may do well. How has he got the opportunity to sing there? I'm impressed