Comment: Re:How does it work through walls? (Score 3, Interesting) 79
FTA: The cheap LEDs, which could for example be placed on the ceiling or in room lights and tend to have coverage of around 10 meters, essentially blink on and off extremely fast to transmit the data (not visible to your naked eye). This would make it extremely useful for short range and high-speed networks that may also require something more secure than wifi (i.e. light doesn’t travel so well through solid walls etc.).
So it IS the room lighting, and yes, it is not meant for long range wireless. But you could link everything in a room to it.