There was a time when pick-me-ups came in the form of shoes and velvet trousers and pretty silk blouses. These days, I’m more likely to enter a lighting shop when I need a hit of retail therapy. Vintage sconces, sculptural pendents, chandeliers beautiful enough to wear; they all light me up. The iconic Serge Mouille mussel shell is the ultimate light. I’d be quite happy to live in it.