Lighting manufacturer Holophane is celebrating its 125th anniversary this year, during which time it has lit everything from coronations at Westminster Abbey through to enemy bombers during the Blitz and, with colour-changing lighting, music hall organs during the 'Roaring Twenties'. In the article following this one, from page 46, Simon Cornwell in his regular Light on the past column outlines some of the innovative work undertaken by lighting manufacturers during the inter-war period in the development of low-pressure sodium lamps (and do check it out). One of them, Holophane, Simon writes, developed the first panel refractor for the 'SO' low-pressure sodium lamp in 1936, before going on to develop a number of other panel refractors and refractor lanterns.
展开▼
