@lispi314 I'm not sure about Li-Fi, as I reckon many manufacturers couldn't help but to crank up the TX power and blind people.

It could be a device-to-device meshnet, with many base stations, provided all the devices are in visual range (with maybe a backup wireless link), but sensitive enough detectors that can pick up for example a stream of single photos are patented up the wazoo and such sort of bandwidth and connection sharing arrangements are prevented as much as possible.