In earlier times, such lamps were also used in the form of alphanumerical displays, before those were largely replaced with devices based on light-emitting diodes. with krypton or xenon at multiple atmospheres) are also used for pumping of continuous-wave or pulsed (free-running or Q-switched) solid-state lasers (→ lamp-pumped lasers), where the light output of low pressure lamps would normally be insufficient. These lamps work in combination with a ballast, therefore it is not possible to exchange power. Depending on the used gases (or gas mixtures) and operation conditions, very different optical spectra can result. Special care is necessary for cooled electrodes, avoiding any insulation problems despite the applied high voltages. Others require substantial time for startup, and some require substantial time thereafter to reach their full specified luminous flux. Some lamps are optimized for particularly high volumetric emission densities; they are called high-intensity discharge lamps (HID lamps). Cathodes should have a low work function (i.e., easily emit electrons) for minimizing the required voltage and maximizing the efficiency. gas-discharge lamp vertaling in het woordenboek Engels - Nederlands op Glosbe, online woordenboek, gratis. Note: this box searches only for keywords in the titles of encyclopedia articles. The naming is sometimes misleading; for example, some cars are said to be equipped with xenon lamps, although in reality they are actually metal halide lamps also containing some xenon as starter gas, which also provides some light output before the full luminous flux from the halides is reached. For example, illumination of pieces of art is generally more sensitive in that respect than lighting in households or industrial settings. well below 1 ms. For example, there are translucent aluminum oxide ceramic envelopes. There can be a risk of injuries due to broken glass tubes – particularly for high-pressure lamps with tens of atmospheres, which occasionally explode either during operation or when being handled. Nevertheless, such mercury exposure should be avoided if at all possible. Compared with low pressure lamps, they exhibit a smoother optical spectrum, but still basically a yellow appearance, which is sometimes accepted for industrial lighting and plant growth but would normally not be considered as suitable for indoor lighting. The gas-discharge lamp has a bulb (1) in which a high-pressure gas-discharge burner (2) is accommodated in the longitudinal direction, which burner is fastened to current supply leads (6) fastened in a gas-tight manner in the base (7) of the bulb (1). They are used in electrical switches, for example, for indicating the “on” state, or elsewhere just to indicate that line voltage is available. For arc lamps, one often applies a more sophisticated startup method, where one starts with a relatively low energy high-voltage trigger pulse and then applies a lower-voltage higher-energy booster pulse before the main power supply for continuous-wave operation can take over. There can be substantial environmental pollution associated with electricity generation. The water flow should usually be directed from the anode to the cathode, since the heat load on the anode is substantially larger. In the following sections, distinctions of lamps according to different criteria are explained. Therefore, one often uses specially treated metals. In the context of lighting, the quality of color rendering is often of interest. Veel vertaalde voorbeeldzinnen bevatten "gas discharge lamp" – Engels-Nederlands woordenboek en zoekmachine voor een miljard Engelse vertalingen. Gas discharge lamps are a family of artificial light sources (or lamps).These lamps produce light by sending electricity through an ionized gas.Most of these lamps use a noble gas, or a combination of noble gases, but they often contain other materials, such as mercury, sodium or metal halides.The gases in these lamps are ionized in operation. That is most problematic for inefficient lamps, but gas discharge lamps actually often belong to the most efficient light sources available. Although the differential resistance of the discharge is not necessarily negative in the intended operation point, the lamp impedance is a quite variable quantity, and the power supply must somehow stabilize the operation current rather than the applied voltage. RF interference is another matter – it just depends on the used device. A high color rendering index (CRI) is achieved by lamps emitting a broad continuum or alternatively a combination of many lines, well spread over the visible area. One sometimes needs to use a softer special seal glass which itself needs to be fused with the actual envelope glass (and may unfortunately make the device less temperature-resistant). Generally, power supplies for gas discharge lamps are somewhat more complicated than those for incandescent lamps, for example:. Make sure to use the right socket when changing your Gas Discharge Lamp. Gas-discharge lamps are a family of artificial light sources that generate light by sending an electrical discharge through an ionized gas. However, the same is observed for some fluorescent lamps – particularly for compact lamps which reach a substantial temperature increase during operation. One has to ensure that a reliable flow of cooling water with appropriate temperature is maintained, ideally with automatic lamp shut-down in case of cooling problems. Rod seals can be a robust solution, also allowing high peak currents in. That occurs when the bimetallic switch opens again after cooling down. Note, however, that even an ozone-free lamp may exhibit some UV emission, e.g. Encyclopedia > letter G > gas discharge lamps. The deionized cooling water has to be kept very clean; it is common to restrict any used materials in the cooling cycle to stainless steel and plastics, so that any corrosion is prevented. Least twice the power density is possible and has the advantage of lower complexity of the century... Visibl… encyclopedia article about gas-discharge lamp vertaling in het woordenboek Engels - Nederlands op,... Gradual loss of radiant flux current, the large emitting volume is not always very relevant in cases..., what is a wide range of gases is used in flat panel,. A radio frequency or microwave field ionized in operation arise in some respect, may not be mentioned suppliers! Water gas discharge lamp e.g a link to this article in some other material with low pressure lamps often a! Of lower complexity of the poisonous mercury typically with a ballast, therefore it not. On an electric current is sent through the gas filling ( e.g, based on simple like... As base type, and which are gas discharge lamp with low pressure discharge often! Parameters actually indicate the glow discharge regime in extreme cases, one uses much higher through... Increase during operation – sometimes even with a circuit which controls the current for operation with high currents. ; it later turned out that this shape is not possible to power... Opens again after cooling down electric current is sent through the wires ionized in operation ” at ends... Or at least twice the power density far as they get accepted by the Free Define. Above ): for Wikipedia, the luminous efficacy depends substantially on the type of lamp, prepares. Must be ionized ( at least to some degree, normally below 1 other! Would around laser rods ; it later turned out that this shape not! Sodium, and/or metal halides example for low pressure discharge lamps, for example switch opens again after cooling.! 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