RARE GAS FLUORESCENT LAMP

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PROBLEM TO BE SOLVED : To provide a rare gas fluorescent lamp whose effective emission region is not reduced by reliably suppressing wide-range propagation of surface discharge on the inner face of a luminous tube even when a conductive material is provided for improving startability. SOLUTION : The rare gas fluorescent lamp comprises the luminous tube 1 to whose inner face a fluorescent material is applied and in which rare gas is filled, a plurality of external electrodes 21, 22 arranged on the outer surface of the luminous tube 1, and the conductive material 3 provided on the inner surface at the end of the luminous tube corresponding to a position where the external electrodes 21, 22 are arranged. On the center side of the luminous tube beyond the conductive material 3 and near the conductive material 3, a surface discharge suppressing means 4 is provided for suppressing the propagation of the surface discharge which is generated between the conductive material 3 and electric charge accumulated on the inner face of the luminous tube 1. COPYRIGHT : (C)2006, JPO&NCIPI