The Chavadi procession mentions fireworks like 'Nale' and 'Chandrajyoti'. Can you explain their chemical composition and why these specific types were chosen?

Chapter 37 vividly details the celebratory atmosphere of the Chavadi procession but does not delve into the technical or chemical aspects of the fireworks used. The text focuses on the devotional experience, noting that as Sai started to go, fireworks like 'Nale' and 'Chandrajyoti' were lit, and torches shone brightly. The narrative's emphasis is on the sounds of horns and trumpets, the bhajan of the devotees, and the overall joy of the crowd. The beauty of the event, as described in the scripture, was found in the collective spiritual ecstasy rather than the specifics of the materials used for the celebration.