Abstract: An apparatus, system and method are provided for use in triggering a flash lamp and treating fluids. In some embodiments, a flash lamp assembly is provided that includes a chamber that surrounds a flash lamp with first and second electrodes that extend through the chamber, and a trigger element positioned adjacent an exterior of the chamber. First and second ends of the trigger element can, in some implementations be proximate the first and second electrodes. Some embodiments provide a fluid treatment system that includes a flash lamp enclosed within a chamber, and a trigger element positioned adjacent an exterior of the chamber. The chamber include an inlet and outlet where fluid to be treated is pushed into the chamber to pass about the flash lamp without contacting the trigger element.