A spark discharge between two electrodes produces an "ionised gas tube" in the xenon gas-filled lamp piston through which electric current flows which in turn causes the gas to light up.
Electricdischargelamp or vapor lamp: lighting device consisting of a transparent container within which a gas is energized by an applied voltage and made to glow.
放电灯，亦称蒸气灯，一种照明器件，由一透明外壳构成，其中的气体被外加电压激发而发光。
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Electricdischargelamp, or vapor lamp: Lighting device consisting of a transparent container within which a gas is energized by an applied voltage and made to glow.