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The first light-operated data transmission network in Russia was launched by ITMO University’s Department of Light Technologies and Optoelectronics. The new format, known as Li-Fi, may become an effective alternative to Wi-Fi. It uses optical signals instead of radio waves, and, in fact, transmits data hundreds of times faster than traditional wireless networking. A speed of 50 Mbps was reached in the ITMO University laboratory, which is comparable, and even superior, to a regular Wi-Fi connection. Li-Fi communication channels are considered to provide better security. They may also be used in Wi-Fi “dead-zones”: operating rooms, airplanes, and in other conditions requiring minimization of radio interference.