Well, I'm not an English native-speaker, but I spent some time in
UK, and I have British accent now and I love British English, so I pronounce both names clah-rah and lah-rah. claire-ah and laire-ah aren't as charming and beautiful as Clah-rah and Lah-rah. I love the name
Clara, and all related and similar sounding names.
Lara is also pretty, but I'm not a big lover of it.