29.01.2009 - Scientists invent GBP2 energy saving lightbulb that last for 60 years

From Telegraph: A £2 energy-saving lightbulb that lasts for 60 years has been developed by scientists at Cambridge University. The researchers have designed a bulb that is three times more energy efficient than today's best offer and can cut lighting bills by 75 per cent. The bulbs are made using Gallium Nitride (GaN), a man-made substance used in LEDs (light emitting diodes). It is routinely used in bike lights, mobile phones and camera flashes..... Full Article: Source

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