This is an interesting idea: LiFi .. wireless in the light spectrum rather than radio spectrum.
http://www.ted.com/talks/harald_haas_wireless_data_from_every_light_bulb.html The idea is simple: using LED light bulbs, and a small modulator, the light can translate considerable amounts of data. And also stop the Tin Hat controversy. But I'm confused by one thing: how to make it work bi-directionally. If that could be solved, we might actually, via LiFi mesh networks, be able to build a "people's network" .. independent of ISPs and government control. I suppose one solution would be hybred: WiFi in the home and LiFi for wide area. It certainly is a fascinating idea .. simply the drive to convert to LED light bulbs would save billions in electricity consumption. -- Owen
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