Combined cathode fluorescent lamp

The utility model relates to a combined cathode fluorescent lamp, which is composed of a lamp tube, an extraction electrode and cathode. The utility model is characterized in that the cathode is combined and is composed of cold cathode and hot cathode which is arranged in the cathode, the extraction electrode is not only connected with the cold cathode but also connected with the hot cathode, a screen circle is installed in the outer part of the combined cathode area, and the other end of the lamp tube is symmetrically provided with the combined cathode. Compared with the existing fluorescent lamp, the utility model has the advantages of long service life, high luminous efficiency, electricity saving, etc., and the utility model can glow under the low voltage (150v) when the utility model is matched with a special circuit.