File talk:Krypton gas discharge lamp - National Museum of Nature and Science, Tokyo - DSC07785.jpg
Latest comment: 9 years ago by Pemu
Compare with File:Krypton-86-lamp NIST 49.jpg. It seems to be a discharge lamp used as a metrological length standard. -- Pemu (talk) 23:19, 27 February 2015 (UTC)
