Electronics Online

The high pressure sodium vapor lamp has a very high light output and is mainly used for street lighting.

Inside a high-pressure sodium vapor lamp is a discharge vessel (burner), which consists of transparent alumina ceramics. The discharge vessel is filled with sodium and another noble gas. To protect and isolate thermally burner and some thick metal cable is pressed into balls or elliptical-shaped glass tube. Metal wires are also used to supply electricity. If the light is in operation, the temperature in the discharge vessel of about 1,000 ° C and pressure of the gas is very high, because of this they are named.

The mercury vapor lamp is a high-pressure gas discharge lamp further. The glass bulb of mercury vapor lamps, high pressure usually has an elliptical shape. Inside the bulb is a quartz discharge tube, the mercury vapor. Because there are two main electrodes, is ignited by two ignition electrodes, which are located directly on 230V mains voltage (see figure).

Compact Fluorescent Lamps (CFL) have very small dimensions and a curved glass tube. This makes it possible to provide them with a screw and screwed instead of normal bulbs in sockets. They are now also known as energy saving lamps.