| 31. | Halogen lamps are a type of incandescent lamp with improved efficiency over regular incandescent lamps.
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| 32. | Groundlings say that they would rather buy halogen and incandescent lamps than curse the dark.
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| 33. | However, recent products have solved these problems so that they perform more like incandescent lamps.
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| 34. | Incandescent lamps were primarily used for street lighting until the advent of high-intensity discharge lamps.
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| 35. | This experiment with carbon led to his design for an incandescent lamp, and on it went.
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| 36. | As of 2016, LEDs use only about 10 % of the energy an incandescent lamp requires.
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| 37. | Chaillet started in the incandescent lamp business with his father, who operated a factory near Paris.
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| 38. | The date of the employment of arc and incandescent lamps may be set at about 1877.
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| 39. | The efficiency of electric lights has continuously improved from the first incandescent lamps to tungsten filament lights.
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| 40. | In 1893, the Edison Electric Light Company sued three manufacturers of incandescent lamps for infringing Edison�s patent.
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