 Xenon is used in light @-@ emitting devices called xenon flash lamps , which are used in photographic flashes and <unk> lamps ; to excite the active medium in lasers which then generate coherent light ; and , occasionally , in <unk> lamps . The first solid @-@ state laser , invented in 1960 , was pumped by a xenon flash lamp , and lasers used to power <unk> confinement fusion are also pumped by xenon flash lamps . 
