The invention relates to electrode material which is characterized in that it has a fluorophor layer on its inner wall, a glass tube with rare gas and mercury sealed in it and a pair of electrodes which are equipped on the two ends of the glass tube. Wherein the electrodes are comprised with Ni alloys, the Ni alloys comprise at least one element out of the basic group comprised with rare-earth element Ti, Hf, Zr, V, Fe, Nb, Mo, Mn, W, Sr, Ba, B, Th, Be, Si, Al, Y, Mg, In, which total mass is greater or equal to 0.001 mass percentages and less or equal to 5.0 mass percentages, and the rest of the alloys is Ni and other foreign materials. As the electrode is comprised with Ni alloys, it has the advantages of having good discharge character, oxidation resistance, sputter resistance and reaction resistance of mercury.