Yup. I've used Lumen a couple times over the past few years. Not sure why you would start a new project with that name, it's already well known and easily searchable.
But yeah, I just started a Lumen project last night for a quick API behind OAuth2. I sometimes have to append "php" or "laravel" to my queries, but that's to be expected considering I don't use Google.
I'm a big fan of Elixir and think Lumen's Elixir -> WebAssembly will be awesome, but I do wish they used another magic potion related name for it.
Lumens come and go.