Rights: University of Waikato. All Rights Reserved. Adapted from an original work by Theresa Knott Creative Commons Attribution-ShareAlike 3.0 Unported Published 9 October 2012 Size: 58 KB

Strongly heating a small piece of lime results in the production of bright white light. 19th century music hall spotlights were developed using this principle. Performers were now ‘in the limelight’ when on stage.