Cambridge University researchers have developed cheap, light-emitting diode (LED) bulbs that produce brilliant light but use very little electricity. They will cost $2 and last up to 60 years. Despite being smaller than a penny, they are 12 times more efficient than conventional tungsten bulbs and three times more efficient than the unpopular fluorescent low-energy versions.
If installed in every home and office, they could cut the proportion of electricity used for lights from 20 per cent to 5 per cent a year. As well as lasting 100,000 hours, ten times as long as today's eco-bulbs, the LED bulbs do not contain mercury, so disposal is less damaging to the environment, and they do not flicker - a problem that has been blamed for migraines and epileptic fits.
'That won't just be good news for the environment. It will also benefit consumers by cutting their electricity bills.
'It is our belief they will render current energy-efficiency bulbs redundant.'
Read full at dailymail