Light Source Lasts 12 Years - No Electricity Needed

A company called MPK is designing a light source that will glow continuously for more than 12 years without any additional energy.

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<p><a href="http://www.physorg.com/news116776284.html">Light Source Lasts 12 Years - No Electricity Needed</a></p> <p>A company called MPK is designing a light source that will glow continuously for more than 12 years without any additional energy.</p>