Lifi is an alternative to WiFi where wireless connectivity is done via light. The technology can enable faster connections and is now standardized as 802.11bb.

WiFi offers wireless connectivity via radio waves, Lifi does the same but via light. The technology has the great advantage that higher speeds are possible. The light used is in the infrared spectrum and is therefore not visible to humans. Connectivity via a light socket, for example, can ensure fast and reliable connections without cables in the office.

Previously, everyone had to agree on exactly how Lifi would work. The Institute of Electrical and Electronics Engineers (IEEE) has therefore finalized a standard: 802.11bb. With this standard, manufacturers can now start building Li-Fi routers and receivers.

Alternative to cables

You can best think of Li-Fi as an alternative to an Ethernet cable, not for Wi-Fi. Because for it to work, there must be no obstacle between the transmitter and receiver that blocks the light. Lifi could be installed in the ceiling of an office where fast connection to computers on the desks is guaranteed without the need for cables. Lifi obviously doesn’t work through walls or other obstacles.

This also has a small additional advantage: it is not possible for a hacker to sneak into a Li-Fi network from behind the corner.

Lifi will undoubtedly have a wide range of uses, even if these will mostly be limited to niches. The radio waves of WLAN are much more flexible and in most cases offer a sufficiently high-quality connection.