Abstract: A xenon lamp apparatus for generating sequential flashes comprises a plurality of sets of lamp units which are connected in series with one another by a socket and a plug which are mounted at either end of each lamp unit. A driving circuit device is preferably provided to actuate an ignition circuit device mounted on a PCB (printed circuit board) within the lamp unit to and send out flashes by control of the driving circuit device. Various flash patterns can be obtained depending on the design of the circuit device.