Grumpy Old Geeks Topics Li-Fi Topic Li-Fi 2 mentions in 1 episode Light-based networking technology whose commercial prospects and security implications the hosts discuss. Mentions 198: Game Over Man, GAME OVER! Feb 27, 2017 56:49 We talked about Li-Fi a long time ago. 57:17 If you want to use this and not have people spying on you, you have to like tinfoil all your windows.