The Chorale is:
a community-based vocal group based in Arlington, Virginia.
Participation in the Chorale is open to all interested performers in Northern Virginia and the National Capital Region. Welcoming all singers without regard to race, gender, national origin, faith, or musical training, this non-auditioned ensemble sings several concerts each year.
Its free performances include a wide range of musical styles, including popular, jazz, global, sacred, folk, holiday, and classical.
NoVA Lights is an independent corporation, not affiliated with any religious or cultural organization.
Here's some video I took of the concert.