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1 .This is Scientific American's 60-Second Tech. I'm Larry Greenemeier. Got a minute?
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2 .Here is a bright idea: instead of radio waves, use light to get online.
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3 .Unlike wi-fi, or wireless fidelity, so-called "li-fi" transmits data through variations in light intensity.
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4 .Researchers in China recently showed that, using a one-watt LED bulb, li-fi could connect four computers to the Internet at data transfer rates up to 150 megabits per second.
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5 .Earlier this year, German scientists sent data at three Gigabits per second using LED lamps, in controlled conditions in their lab.
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6 .They later demonstrated 500 megabits per second speeds in a real-world setting.
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7 .Most wi-fi connections don't even come close to 100 megabits per second.
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8 .Li-fi has drawbacks.
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9 .The technology works only when the LED's light can reach the gadget.
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10 .Stray from the LED, and you lose your connection.
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11 .On the plus side, the visible light spectrum can handle way more traffic than wi-fi's already crowded radio spectrum.
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12 .And any LED bulb can be a network connection.
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13 .We may someday look back at wi-fi as technology from the dark ages.
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14 .Thanks for the minute, for Scientific American's 60-Second Tech. I'm Larry Greenemeier.
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