LED lightbulbs that replace Wi-Fi networks are being tested in the real world

Li-Fi is a curious technology that's been on the cusp of real-world applications for years. The idea is to use visible and infrared light instead of radio signals to create a wireless internet network, creating a (theoretically) more stable alternative to crowded Wi-Fi channels. The technology has been in the concept stage for years, but Philips has announced that it's conducting a real-world test in the office of a French architecture firm in Paris to see how it performs in the real world. To s...