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Extended Use Of Incandescent Lamps
Dec 28, 2017

Only by lowering the temperature and reducing the filament temperature can the aim of prolonging life be achieved. Tungsten wire operating temperature up to 2,700 ℃, light bulb light less than 1 hours off, tungsten filament operating temperature down to 1700 ℃, the service life can be extended to more than 1000 hours.

However, this is not a good idea. Reducing the working temperature of the tungsten filament, which is to reduce its incandescent degree, will make the luminous efficiency of the incandescent lamp lower, far less bright than when the temperature is high.

Thus, the question is plainly placed in front of people: to the incandescent lamp more luminous, you have to increase the working temperature of the filament, to reduce the evaporation of tungsten filament to prolong the life of the lamp, but also to reduce its temperature. This is contradictory.