Similarly to you, doing Europe for 2 weeks .. second time this year.
My go-to as far as lighting goes is a Malkoff hound dog 18650 head on a 21700 body, with a spare 21700 in a cell protector.
My 2nd light is an HDS rotary - NB 40, 200 lumen. With 4 extra extra cells in a cell protector.
I generally will EDC the HDS rotary, small and compact but extremely versatile and arguable one of my best edc lights considering it'll be able to provide you with the exact amount of light that you'll need for any given task.
The Malkoff usually stays in the room, in case of emergency, such as blackout or the like - I'd be grabbing that, the runtime on low on a 21700 is plenty, but if a situation calls for it I'd kick it into high and be able to illuminate an entire building if needed.
I think it's a pretty good bomb proof setup.
I'm also not afraid of losing them or having them stolen.
It's no different then being in the USA… I've also lived in Europe for multiple years before the EU was a thing… sadly Europe is not the same as back then 20+ years ago…the lack of immigration enforcement / open borders just because you have a passport from a country that falls under the "EU" banner was an absolutely terrible idea, it's certainly noticeable…
Anyway, enjoy your trip, there is still plenty of upside to visiting! …