TUBULAR FLUORESCENT LAMP WITH INTERMEDIATE ELECTRODE

摘要

In a fluorescent lamp, a curved discharge path is constituted by a plurality of bulbs and a cap interconnecting end portions of the bulbs. Terminal electrodes are provided at end portions of the bulbs, which are situated at both ends of the discharge path. An intermediate electrode is arranged within the cap. A voltage is applied selectively between the intermediate electrode and the terminal electrodes, thereby selectively enabling the bulbs to emit light. The bulbs may have apertures having different widths and positions. Different types of phosphor layers may be formed on the inner surfaces of the bulbs, thereby selectively emitting light of different wavelengths.