RARE GAS FLUORESCENT LAMP

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PROBLEM TO BE SOLVED : To provide a rare gas fluorescent lamp having improved efficiency of light emission. SOLUTION : In the rare gas fluorescent lamp, a phosphor is applied onto the inner face of an arc tube, a pair of electrodes are formed on the outer face of the arc tube in the tube axial direction, and the arc tube is filled with rare gas consisting dominantly of xenon gas. The electrodes have portions where their widths are cyclically increased/reduced in the tube axial direction. Each wide electrode site excluding both end sites of one electrode in the tube axial direction is opposed to each narrow electrode site between wide electrode sites of the other electrode across the arc tube. COPYRIGHT : (C)2010, JPO&INPIT