<http://schema.org/about>
"The cooler an LED bulb, the more efficient, which is why so many LED companies are focused on technologies that cool LEDs. And that is why we get some pretty funky designs, from bulbs with strange spiral casings, and... bulbs"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/ces-2010-are-liquileds-liquid-filled-led-bulbs-next-generation-of-led-lighting.html>