Flashy Tech in Metro: Li-Fi
In today’s Metro tech section I shed some light on Li-Fi, a flashy new wireless tech that uses your living room light to help you browse safer and faster.
In a nutshell, Li-Fi is just like Wi-Fi except it uses visible light from domestic LED light bulbs to carry data, instead of invisible radio waves from a Wi-Fi router. As I put it in the Metro story, think Morse code on steroids.
Of course, using visible light does raise a few questions: many of us do not have our lights switched on during the day, some of our connected devices may sit under a desk in the dark, and rapid flashing or flickering is known to provoke headaches or worse.
I spoke with Professor Harald Haas, the luminary behind Li-Fi (here’s his TED talk on Li-Fi), who is well-practised at batting away these concerns as well as speaking of the technology’s benefits in terms of security, speed and even health:
Professor Haas is the co-founder of pureLiFi, the Edinburgh firm attempting to turn the technology into a viable commercial proposition. Its latest product, the pureLiFi-XC, features a USB adapter the size of a thumb drive with drivers certified for Microsoft Windows, Apple MacOS and Linux. Android and iOS smartphones and tablets are not supported yet, but pureLiFi hopes one day its technology will be embedded into all devices, just as to Bluetooth and Wi-Fi are now.
Li-Fi-enabling our light bulbs may prove more of a stumbling block, however. Each LED light that supplies a wireless data stream must be controlled by a Li-Fi access point which, in turn, must be network-connected. pureLifi may need to provide more ingenious ways to minimise the friction of installation if it is to muscle-in on Wi-Fi’s patch, particularly if it is to make waves in the domestic sector.
Nevertheless, if growth in connected smart-home and internet of things devices means that demand for radio frequency bandwidth exceeds availability – the so-called ‘spectrum crunch‘ – then technologies like Li-Fi will certainly have a place in our homes and offices of the future.
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