I think “Lights” is in D mixo. Yes, the Journey song. There’s not a C# to be had in the thing, but there’s lots of Cnats and GM in place of A7.
Crapo. “Lights” is in D mixo.
Update: Whoop, I’m wrong! There’s a C# in the 14th measure. That I added in a little ornament that isn’t there in the radio play version. Gadzooks, I’ve unmixolydianized it! Gawd, I love English. What other language will let one invent words like that, just slapping prefixes and suffixes willy-nilly onto stuff and resulting in something entirely legitimate?