Engineers have devised a way to make almost any device fitted with standard visible-light LEDs able to communicate with other equipment with similar lights Various researchers have created ways to transmit wireless information from LED light fittings, to act as a form of enhancement to Wi-Fi based networks known as " Li-Fi ." But now engineers at the University of Virginia have come up with a new twist on this theme - they claim to have created an algorithm that makes almost any device fitted with standard visible- light LEDs able to communicate with other equipment with similar LEDs.