January 12, 2016

TAX WHAT YOU DON'T WANT:

Return of incandescent light bulbs as MIT makes them more efficient than LEDs (Sarah Knapton,  11 Jan 2016, The Telegraph)

They refer to the technique as 'recycling light' because the energy which would usually escape into the air is redirected back to the filament where it can create new light.

"It recycles the energy that would otherwise be wasted," said Professor Marin Soljacic.

Usually traditional light bulbs are only about five per cent efficient, with 95 per cent of the energy being lost to the atmosphere. In comparison LED or florescent bulbs manage around 14 per cent efficiency. But the scientists believe that the new bulb could reach efficiency levels of 40 per cent.

And it shows colours far more naturally than modern energy-efficient bulbs. Traditional incandescent bulbs have a 'colour rendering index' rating of 100, because they match the hue of objects seen in natural daylight. However even 'warm' finish LED or florescent bulbs can only manage an index rating of 80 and most are far less.

They'll never match the sweet glow of whale oil lamps....

Posted by at January 12, 2016 5:26 PM

  

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