In preparation for the first International Day of Light, we asked members of the SPIE community to explain why they feel light is so important. We will feature their answers throughout the coming months as we get ready to celebrate the first IDL. The inaugural International Day of Light – IDL – will take place 16 May 2018. IDL is a global initiative that provides an annual focal point for the continued appreciation of light. This day recognizes light and the vital role it plays in science, culture and art, education, and sustainable development. On 16 May, join SPIE and communities worldwide by participating in activities that illustrate how the science and art of light improves all our lives. For more information and to plan your own event, visit spie.org/IDL . Meet SPIE Member John Dudley , Steering Committee Chair of IDL 2018 What about light inspires you? I am fascinated by the properties of light and how it is so central to all areas of science. Space ...