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Lamp filling and atom size
How filling gases differ :
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The
size of the gas atoms is different: Xenon is bigger than
Krypton is bigger than Argon. The bigger and heavier the
gas atoms are, the "better" they slow the evaporation
of tungsten. |
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Gas
fillings change the performance in one or both of
two ways : |
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Increase
light output, by increasing filament temperature,
while keeping tungsten evaporation moderate |
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Improve
life time significantly, by lowering filament evaporation |
Lamp
design
= Filament design + choice of gas
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To
design a new filament, the lamp’s gas filling has to be
taken into consideration. |
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