Organisms can produce visible light, which is often associated with deep sea living creatures where it is abundant. However, many luminous organisms also show their magical display at night. We study luminous organism to understand the chemical reaction that leads to the production of visible light. Not many of such reactions are currently described, and there is a good incentive to discover more about how to make “biological light” for many different applications for biotechnology where light is used as a tracer but also quantum energy and biophotonic research.