| 1. | Some have lower efficiency than filament lamps, and some significantly higher.
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| 2. | The early calculators used hundreds of CRT, cold-cathode Nixie tubes, and filament lamps.
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| 3. | In 1909, Osram began production of the most successful tungsten filament lamps in the industry.
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| 4. | In 1937, Meacham described using a filament lamp for automatic gain control in bridge oscillators.
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| 5. | The Mini Cooper S won the headlamp dimming circuit in place of a dual-filament lamp.
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| 6. | The lighthouse had a 1, 000 watt filament lamp with an intensity of 500, 000 Candela.
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| 7. | Edison's earliest steps in the bamboo filament and graphite filament lamps are displayed in this case.
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| 8. | Because of this, the lifetime of a filament lamp is a trade-off between efficiency and longevity.
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| 9. | Each socket took a miniature two-candela carbon-filament lamp.
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| 10. | Typically four filaments are used and the appearance is similar to an overrun carbon filament lamp.
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