Harald Haas: Wireless data from every light bulb | Video on TED.com
This amazing demonstration of the way LED light bulbs can utilize current infrastructure to provide secure transfer of digital information stopped me in my tracks. Many of the posts to the video discuss the possibilities for spying and espionage, but I am trying to imagine the implications it could have for schools. A teacher could provide specific information to students within a classroom directly to laptops, students could utilize cell phones or PDAs as 'clickers,' assignments or projects could be delivered to and shared among small groups of students - only within light range - without the fear of cheating. The reduced cost is incredibly appealing, tempered only by the potential cost of the conversion technology (provided by Haas' company). It gives one pause as to the potential this could hold ...
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