WEBVTT

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Morse code DVD drives fiber optics that

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helicopter from Independence Day that got super wrecked by those aliens who

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weren't that friendly we've been using visible light to communicate with each

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other in a lot of different ways for a long time but imagine this for a second

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data flowing out of your living room light fixture like water from a shower

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head it's real and it's called lii the

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LIE of course standing for Li because I invented no just kidding uh standing for

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light but aside from the novelty of it how would this be better than existing

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standards like Wi-Fi that use radio waves

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great question well unlike the RF signals that make up a Wi-Fi connection

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which tend to spread out everywhere from the access point visible light is easier

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to focus and concentrate in one area I mean just go outside with a magnifying

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glass on a sunny day if you don't believe me this makes it possible to fit

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a lot more data into a lii signal but

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then it raises even more questions how would visible light transmit data anyway

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well lii uses LED bulbs which can be

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switched on and off very very quickly they don't have that warmup time or that

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warm up time of an incandescent or a fluorescent so quickly can this be done

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in fact that the human eye cannot even detect it but special receivers that can

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connect to your computer or other device can translate this flickering into

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actual data and here's another cool thing visible light is also much less

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susceptible to interference than radio waves so you add all that up and you end

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up with a communication standard that could be much faster than Wi-Fi in fact

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researchers at Oxford achieved speeds of

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224 gbits per second in the laboratory

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that's over 200 times faster than even a Google Fiber internet connection and

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Beyond just raw speeds lii promises to

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offer a number of other advantages since it only uses visible light lii signals

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can't penetrate walls offering a higher degree of privacy a malicious user who

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wants to Snoop on your network traffic would actually have to be physically in

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the same room or at the very least creeping outside your window making it

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nearly impossible for someone outside your home or office to eat drop on your

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wireless signal and since lii uses

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relatively inexpensive LED bulbs which consume less power than a Wi-Fi access

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point visible light networks could be deployed relatively cheaply using mostly

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existing technology the power savings also potentially could have significant

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implications for Global energy consumption if lii becomes as ubiquitous

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as Wi-Fi has one day especially as lii

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transmitters can be dimmed to reduce bandwidth with if you don't need to

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download 15 movies in 1 second but although the technology has great

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potential it is still very experimental

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and we probably won't be seeing it hit the mainstream market for several years

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at best and it isn't without its limitations either for example lifi

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offers greater privacy but the disadvantage of obviously not working in

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the Next Room over unless you've you know got your light bulb synced or

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whatever else and it could also be disrupted by excessive light pollution

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though maybe we're ignoring the biggest advantage of all not having to shop for

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routers and light bulbs in a separate aisle at the store anymore you guys

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should definitely check out the link in the video description to Fresh books

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it's designed for freelance workers or small businesses and it's basically an

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online tool that makes invoicing getting paid and tracking your expenses easier

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all the little details about cash flow are in one place so you know where you

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stand it shows a full history of each invoice and allows you to check if your

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client has viewed the invoice and PID directly through fresh books by credit

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card and this is cool they actually just launched their deposits feature so if

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you're a house painter or a plumber or any kind of work where you might do you

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know a deposit and then half the work and then you know some more work and

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then they pay the rest at the end or whatever else those more complicated

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payment schemes are Now supported pretty

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cool stuff so all you got to do to try out freshbooks for free is head over to

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freshbooks.com tequ and don't forget to enter Tech

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quicki and the how did You Hear About Us section so thanks for watching guys if

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you liked this video hit that like button if you disliked it well

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whatever I guess you can hit the dislike button too that's another reaction also

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check out our other channels over online as Tech tips we've got a great video

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that just went up recently of uh wow oh yeah Brandon reviewed a camera was

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pretty sick the a7s Mark 2 or two or R2 or whatever it is that Sony calls their

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second generation follow-ups we can never keep track of these things also

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leave a comment below if you have suggestions for future videos and don't forget to subscribe and follow Tech

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quickie for more videos just like this one or maybe unlike this one maybe like

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the one you suggested