Discharge lamps

Gas discharge lamps and metal-halide lamps: The terms "gas discharge lamp" and "metal-halide lamp" have a basic meaning. In discharge lamps, light is produced by passing electricity through an ionised gas or metal vapour contained in a pressurised, sealed vessel. This results in the release of energy in the form of directly visible light or ultraviolet light. In the case of ultraviolet light, this is converted into... Read more »
Gas discharge lamps and metal-halide lamps: The terms "gas discharge lamp" and "metal-halide lamp" have a basic meaning. In discharge lamps, light is produced by passing... Read more »
Discharge lamps
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Discharge lamps

Gas discharge lamps and metal-halide lamps

The terms "gas discharge lamp" and "metal-halide lamp" have a basic meaning. In discharge lamps, light is produced by passing electricity through an ionised gas or metal vapour contained in a pressurised, sealed vessel. This results in the release of energy in the form of directly visible light or ultraviolet light. In the case of ultraviolet light, this is converted into directly visible light by a luminescent substance applied to the inside of the illuminant. This functional principle gives gas discharge lamps and metal-halide lamps their names.

Discharge lamps with ballast unit

Discharge lamps usually consist of a discharge vessel, often tubular, made of glass, quartz glass or aluminium oxide ceramic. Inside the vessel, an electrical field builds up between two electrodes, where the gas discharge finally occurs. However, discharge lamps require current limiting, as they would otherwise be damaged by unregulated energy consumption. This function is usually performed by an electronic ballast unit that is integrated in the lamp. The discharge vessel usually contains a gas, gas mixture or vapours of metals. These can be noble gases such as xenon, krypton or neon, plasma-forming substances such as the vapours of sodium and mercury, or mixtures of halogens and metals, as well as other gases. The substances vary depending on the model.

Discharge lamps generate radiation by means of an electric arc

Discharge lamps produce radiation by means of an electric arc between two electrodes. This radiation either emerges directly from the lamp as visible light (e.g., in metal-halide lamps) or is converted from UV radiation to visible light by a phosphor layer on the bulb wall (e.g., in fluorescent lamps). The operating pressure in the discharge tube is either low (low-pressure discharge lamps) or high (high-pressure discharge lamps). High-pressure discharge lamps are particularly energy-saving: small and compact in design, they deliver extremely large amounts of light and have a long service life. Metal-halide lamps and sodium vapour lamps are particularly popular – they can be double-ended, tubular or ellipsoidal, depending on the space.

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Osram Powerstar HQI-E 400W D PRO E40
Osram Powerstar-Lampe HQI E 400/D
Osram Powerstar-Lampe HQI E 400/D
Halogen-Metalldampflampe POWERSTAR® HQI®-E matt • Hersteller Osram • Artikelbezeichnung Powerstar-Lampe • Typen-Bezeichnung HQI E 400/D • Hersteller-ArtNr HQIE400D • E.A.N. 4050300019727 •...
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Osram Powerstar HQI-TS 250W D PRO Fc2
Osram Powerstar HQI-TS 250W D PRO
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Halogen-Metalldampflampe POWERSTAR® HQI®-TS • Hersteller Osram • Artikelbezeichnung Powerstar-Lampe • Typen-Bezeichnung HQI TS 250/D UVS • Hersteller-ArtNr HQITS250DUVS • E.A.N. 4050300436050 •...
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Osram CP71 64747 230V 1000W G22 200h
Osram CP71 64747 230V 1000W G22 200h
Osram CP71 64747 230V 1000W G22 200h
Areas of application Professional film and TV work • Theater and concert stages • Entertainment • Product features Operation at mains voltage: 120 V | 230 V | 240 V • Color temperature: 3,000 K...
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OSRAM 64788 230V/2000W GY-16 400h 3200K
OSRAM 64788 230V/2000W GY-16 400h 3200K
OSRAM 64788 230V/2000W GY-16 400h 3200K
Shipping weight: 0.13 kg • Ecodesign regulation: Yes • Special product: Not designed for household room illumination • Purpose: Show effect lighting • EU energy labels printed on the carton may be...
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OSRAM 64789 230V/2000W G-38 400h
OSRAM 64789 230V/2000W G-38 400h
OSRAM 64789 230V/2000W G-38 400h
Studio-lamp for base G-38 Based one-sided • Easy replacement of lamps • Rated voltage 230 V • Burning position 90? • Tension: 230 V • Rating: 2000 W • Socket: G-38 • Life: 400 h • Color...
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OSRAM HSR 575/72 95V/575W GX-9,5 1000h
OSRAM HSR 575/72 95V/575W GX-9.5 1000h
OSRAM HSR 575/72 95V/575W GX-9.5 1000h
Made in Europe • Nominal wattage: 575 W • Base: GX9.5 • Color temperature: 7200K • Dimmable: No • Color rendering index (CRI) more than: 85 Ra • Lamp life: 1000 h • Luminous flux: 49000 lm •...
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OSRAM HMI 575/GS o. DXS 95V/575W SFc-10
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OSRAM HMI 575/GS 95V/575W SFc-10 1000h
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Osram HQI-TS 70W NDL Excellence
Osram HQI-TS 70W NDL Excellence
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Halogen-Metalldampflampe POWERSTAR® HQI®-TS • Hersteller Osram • Artikelbezeichnung Powerstar-Lampe, RX7s • Typen-Bezeichnung HQI-TS 70W/NDL/EXCEL • Hersteller-ArtNr HQI-TS 70W/NDL/EXCELLENCE •...
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Philips CDM-T 70W/830 G12
Philips CDM-T 70W /830 G12
Philips CDM-T 70W /830 G12
Cap-Base: G12 [ G12] • Operating Position: UNIVERSAL [ Any or Universal (U)] • Life to 5% Failures (Nom): 9000 h • Life to 10% Failures (Nom): 10000 h • Life to 20% Failures (Nom): 11000 h • Life...
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Philips CDM-TC 35W/830 G 8.5
Philips G8.5 CDM TC 35W/830
Philips G8.5 CDM TC 35W/830
Cap-Base: G8.5 [ G8.5] • Operating Position: UNIVERSAL [ Any or Universal (U)] • Life to 5% Failures (Nom): 9000 h • Life to 10% Failures (Nom): 10000 h • Life to 20% Failures (Nom): 11000 h • Life...
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Facts

Gas discharge lamps and metal-halide lamps

The terms "gas discharge lamp" and "metal-halide lamp" have a basic meaning. In discharge lamps, light is produced by passing electricity through an ionised gas or metal vapour contained in a pressurised, sealed vessel. This results in the release of energy in the form of directly visible light or ultraviolet light. In the case of ultraviolet light, this is converted into directly visible light by a luminescent substance applied to the inside of the illuminant. This functional principle gives gas discharge lamps and metal-halide lamps their names.

Discharge lamps with ballast unit

Discharge lamps usually consist of a discharge vessel, often tubular, made of glass, quartz glass or aluminium oxide ceramic. Inside the vessel, an electrical field builds up between two electrodes, where the gas discharge finally occurs. However, discharge lamps require current limiting, as they would otherwise be damaged by unregulated energy consumption. This function is usually performed by an electronic ballast unit that is integrated in the lamp. The discharge vessel usually contains a gas, gas mixture or vapours of metals. These can be noble gases such as xenon, krypton or neon, plasma-forming substances such as the vapours of sodium and mercury, or mixtures of halogens and metals, as well as other gases. The substances vary depending on the model.

Discharge lamps generate radiation by means of an electric arc

Discharge lamps produce radiation by means of an electric arc between two electrodes. This radiation either emerges directly from the lamp as visible light (e.g., in metal-halide lamps) or is converted from UV radiation to visible light by a phosphor layer on the bulb wall (e.g., in fluorescent lamps). The operating pressure in the discharge tube is either low (low-pressure discharge lamps) or high (high-pressure discharge lamps). High-pressure discharge lamps are particularly energy-saving: small and compact in design, they deliver extremely large amounts of light and have a long service life. Metal-halide lamps and sodium vapour lamps are particularly popular – they can be double-ended, tubular or ellipsoidal, depending on the space.