because the people of northeast Thailand have a deep belief that fire - known in Thai as "Fai" - possesses the power to kill devils and cast out hardship,fire figures prominently in most of the region's customs.
Among these is Lai Ruea fai festival,literally translated as the illuminated boat procession,which takes place annually along the mekong river in nakhon phanom on ok phansa day, which coincides with the fifteenth night of the waxing moon of the 11th lunar month.