Linear (soffit) halogen lamps. Scheme, description

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Halogen incandescent lamps. Linear (soffit) halogen lamps. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Halogen lamps

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The new light characteristics achieved with halogen lamps made it possible to develop a special range for them, which only partly overlaps with the types of incandescent lamps produced.

Initially, heat lamps with additives of halogen compounds appeared in the form linear (soffit) models, the filament in which occupied the entire length of the bulb (Fig. 5.2).

Linear (soffit) halogen lamps
Rice. 5.2. Appearance of linear GLN

This design is especially successful for parabolic-cylindrical light concentration systems. The first models of linear lamps had high power (1000-20000 W) and were intended for spotlights and outdoor lighting fixtures. In the future, there was a tendency to shift the model range towards lower capacities, and today it includes denominations of 60,100,150, 250, 300, 500, 750,1000,1500 and 2000 W. The vast majority of models are equipped with two R7s-type plinths.

The length of the lamp, as a rule, grows with increasing power, but, nevertheless, there is no one-to-one correspondence. Small and medium power models are available in three sizes, with overall lengths of 78,3, 117,6 and 189,1 mm. When selecting lamps for replacement in existing fixtures, it is important to pay attention to the fact that lamps with a power of 150 and 200 W are produced in both the first and second listed versions.

Despite the fact that many manufacturers announce the admissibility of an arbitrary working position of lamps of this type (except for powerful models), the best burning position for them is horizontal, with deviations of no more than ± 15 °. This is due to the peculiarities of fastening the filament inside the bulb.

Author: Koryakin-Chernyak S.L.

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