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Tungsten Halogen - Double Jacket
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Updated
14-IX-2014 |
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Double Envelope halogen lamps consist of an inner halogen capsule sealed within a secondary outer bulb. The design may be adopted for a number of reasons - for instance to protect quartz capsules from accidental contamination with fingerprints, to protect surroundings from possible shattering of the inner capsule at end of life, to filter out UV radiation, to reduce the surface temperature of external parts of the lamp, or simply as a convenient mechanical structure which allows easy retrofitting of conventional incandescent lamps.
They were first introduced for special applications such as photographic and studio lighting, but were later engineered to replace ordinary incandescent lamps employed in general lighting service. In particular since the phasing out of low-efficacy incandescent lamps in many parts of the world, double envelope halogen lamps have grown in popularity owing to their low cost, perfect colour rendering properties, simple operation and similar appearance and dimensions to incandescent lamps. |
| | Quartz Capsule High Power |
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Philips |
1000W |
| Double Jacket High Efficacy - IODE |
| 1989 |
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Wotan |
250W |
| Halostar High Wattage - Original Glass Design |
| 1986 |
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Osram |
250W |
| Halostar High Wattage - Later Ceramic Design |
| 1990 |
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| | Quartz Capsule Low Power |
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Thorn |
100W |
| Low Wattage Universal Burning - Ceramic type |
| 1989 |
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Thorn |
100W |
| Low Wattage Universal Burning - Glass type |
| ~1989 |
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Thorn |
150W |
| Low Wattage Universal Burning - Frosted type |
| 1989 |
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Philips |
75W |
| Halogèna Low Wattage Tubular Frosted |
| 1989 |
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Philips |
75W |
| Halogèna Low Wattage Bulged Tubular Clear |
| 1990 |
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Philips |
100W |
| Halogèna Low Wattage Bulged Tubular Opal |
| 1991 |
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Philips |
60W |
| Halogèna Low Wattage Bulged Tubular Miniature |
| 1991 |
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Philips |
60W |
| Halogèna Natural Light Plus Neodymium Glass |
| 2004 |
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Osram |
60W |
| Decorative with unsealed Hexagonal Candle bulb |
| 1994 |
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Osram |
60W |
| Halolux Classic Pear Shape GLS Retrofit |
| 2004 |
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Radium |
60W |
| Halogen Double Envelope with Oxygen Fuse |
| 2004 |
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| | Hardglass Capsule |
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GE |
51W |
| A-Line Performance Plus Hardglass Design |
| 1987 |
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Sylvania |
72W |
| Capsylite High Efficacy with Diode Rectifier |
| 1989 |
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Sylvania |
50W |
| Halogen DLX with Hardglass Capsule |
| 1994 |
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| | Integrated Transformer |
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Philips |
30W |
| MasterClassic with 12V IRC Capsule & Transfo. |
| 2008 |
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