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Lumen electricum
Lumen electricum est machinula quae vim electricam in lucem convertit. Primum inventum luminis electrici fuit filum candescens in vitro bulbiformi inclusum, qui globulus electricus etiam nunc aliquatenus in usu habetur. Postea quidem alia genera luminum facta sunt, sicut lampas fluorescens, lampas halogena, lampas LED.
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