You may not believe it but the replacement of the LED lamp is an incandescent light

Once upon a time, incandescent bulbs were no longer used in everyday life, on the grounds that they were extremely wasteful of electricity. But with the new technology capable of "reusing" the heat generated, perhaps the new incandescent light is the most energy-efficient light bulb.

The time when Europe restricted the consumption of traditional incandescent bulbs, was also the time when families began to show "headaches" with indoor lighting plans. Because of this, fluorescent bulbs with continuous flashing light, or monotonous white light of LED bulbs, make many people remember the warm light coming from old filament bulbs.

However, filament bulbs encounter a very serious problem - consuming electricity, because most of the electricity used for this lamp is converted into thermal energy. This disadvantage makes traditional filament bulbs gradually losing their standing in front of other power-saving lamps many times.

US scientists believe they have found a way to bring incandescent light bulbs back to households, through the use of a special crystal structure for light bulbs , thus " reuse " is the energy lost by conversion into heat , but still allows light to pass through.

"The energy that is normally lost is now reused for lighting," said Professor Marin Soljacic, from MIT.

Once upon a time, filament bulbs "dominated" the field of lighting.

Typically, the performance of traditional incandescent bulbs is only about 5% - 95% of the remaining electricity wasted into the environment. LED bulbs and fluorescent bulbs have an efficiency of about 14%. And scientists believe that new incandescent lamps can achieve efficiencies of up to 40%.

Moreover, the inherent advantage of traditional incandescent light bulbs remains the same, with " Color Rendering Index - CRI" of 100 - ie the illuminated object will have the same color as in the lawsuit under sunlight. Meanwhile, the more fluorescent bulbs and LED bulbs, the higher the color rendering index, the lower the lighting efficiency. Because CRI is inversely proportional to illumination performance, the more energy-efficient the lamp is and the stronger the light intensity, the lower the light color.

"This light bulb is just a prototype to show our ideas, so their real potential will be many times greater" - said Ivan Celanovic, project manager, division. share.

"What's more important, is that this template has achieved an almost absolute color rendering index ."

Until they are replaced by fluorescent bulbs.

"This is why incandescent light bulbs have dominated the lighting industry for a long time: people prefer this warm light more than the dull white light of fluorescent light bulbs. ".

In 1878, British physicist and chemist Joseph Swan invented the first incandescent light bulb, ending the period when humans burned candles and tallow to light. This bulb works by heating a tungsten fiber to a temperature of about 2,700 degrees Celsius . This heated " filament " fiber will emit a very wide spectrum to illuminate surrounding objects.

However, most of the energy supplied to this light bulb is wasted in the form of heat. This makes many countries decide to limit and proceed to stop using incandescent light bulbs, in order to save electricity. The British government announced in 2007 that restrictions, proceeding to completely stop using incandescent bulbs in 2011. But some manufacturers have found a way to "circumvent the law" to sell incandescent light bulbs. , taking the reason for serving the needs of industrial buildings.

Sample of new incandescent lamps.

According to the calculation of the Energy Saving Organization, the average living room of a family will cost about 245,000 VND per year if lighting with incandescent light bulbs. This figure, for fluorescent bulbs is 49,000 VND, and LED bulbs are 41,000 VND.

However, the new incandescent bulb is expected to cost only VND 16,000 per year, further ensuring health for the family.

Scientists in previous reports have warned that the light of fluorescent lamps can make people lose sleep at night . Moreover, in the process of producing light bulbs, some toxic chemicals are also used.
Professor Gang Chen, from MIT added: "The lighting potential of this new light bulb is very interesting."

This research has now been published in Nature Nanotechnology.