Want to get tickets ahead of arriving, Jun 19th. When does it get dark for twilight time? Maybe just before Paris dinner time, 6pm, it won't be quite so crowed?
Thanks
Six? Hah! Sunset's going to be around ten, twilight will end an hour later. The later you go, the less the crowds. Buying tickets ahead of time might screw you up if the weather stinks at your reserved time.