| 摘要 |
The invention relates to a high-pressure sodium lamp which is provided with a discharge tube having an external auxiliary electrode. The auxiliary electrode is switched off by a bimetallic switch in the operating condition of the lamp. According to the invention the lamp also comprises a glow starter which in the operating condition of the lamp is switched off by means of the same bimetallic switch. This apparatus achieves in a simple manner, a large available voltage for igniting the discharge tube with an operating condition of the lamp in which no disturbance is experienced from any of the ignition auxiliary means. |
