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A comment on Forget WiFi, It's LiFi: Internet Through Lightbulbs.

Re:Forget WiFi, It's LiFi: Internet Through Lightbulbs by alok-g on Friday August 05, 2011 @02:53PM (#2851232)
This is not a new idea. Saw a functional demo more than eight years back. Checkout: http://www.talking-lights.com/
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Re:Forget WiFi, It's LiFi: Internet Through Lightbulbs by isTravis on Friday August 05, 2011 @02:59PM (#2851254)
Completely correct. This is not a new idea at all. However TalkingLights had a huge bandwidth limit because they used flourescent lighting.

LEDs can go to much higher speeds - but even still, this isn't new. Researchers in Japan and Boston University have been producing demos for years:

http://www.bu.edu/smartlighting/research/smart-light-prototy...

http://www.naka-lab.jp/index_e.html

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Re:Forget WiFi, It's LiFi: Internet Through Lightbulbs by cma on Friday August 05, 2011 @07:23PM (#2852217)
Much much older than that: http://www.alge.no/ebooks/Optical_tempest.pdf

This technique was used in at least the early 90s

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