The resurrection of the light bulb

Researchers of the MIT create a lamp incandescente so efficient like the LED

Condemned to death by his low efficiency, the lamps incandescentes could have a second opportunity. American researchers have achieved that the heat that issue turn more light. With the first prototypes have equalised in performance to some lamps LED, but thanks to lananotecnología are convinced that they will light more and better that the luminarias current.

The one of the light bulbs is one of the technologies more ineficientes that have invented the human being. Since Edison and Swan presented his respective light bulbs does almost 140 years, his foundations have changed little: the electrical current goes through a material that melts to very tall temperature (the wolframio or tungsten) surrounded by an inert gas so that the filament do not burn and all shut in a capsule of glass. The problem of this technology is that it consumes too much energy for the little light that gives. Only among 10% and 15% of the energy is turn visible light, the rest transforms in heat, in his majority in shape of infrared radiation, in the no visible rank of the spectre.

Although this ineficiencia is part of his charm, since it is responsible of the warmth that give the light bulbs incandescentes, also has caused that the distinct authorities have forbidden his manufacture and sale and imposed a diary of withdrawal. In Europe, no longer can achieve the more ineficientes and only the halógenas with a main ratio of lumen by watt (lm/w) have attained a moratorium until 2018. In Mexico, for example, does not commercialise any incandescente from the past year.

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The resurrection of the light bulb

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