In principal the construction of the flashtube is quite simple. A glass or quartz tube is configured to the appropriate shape, filled with Xenon gas, and an electrode is sealed in at each end. Then, a means of triggering the tube . . such as a wire wrapped around the outer diameter . . is devised. Of course, the performance of such a tube is dependent upon things such as: . Type of glass or quartz envelope . Arc length or tube diameter . Electrode design . The Xenon gas pressure and composition . The method of triggering the flash.