Chinese office lighting broadcasts 2Mbps "LightFi"

Researchers have developed a new form of wireless networking that uses low-cost office lighting – but will it reprogram your brain in the process? The theory is simple: LEDs installed in the ceilings are managed by a controller that changes their brightness very, very quickly. Data can thus be encoded in the signal, providing a stream of wireless data that can be received by deskbound computers and laptops throughout a working or living space.