A Leblanc clarinet. I experimented with a variety of light sources from flash to candles. Whilst candles create a lovely warm glow if (when) they flicker they can ‘blur’ the crispness of the keywork. This meant that I had to stand very still during the long exposures and not breathe too much, if at all. This is presumably what ‘sacrificing for your art’ means. At least I still have two ears though.