too many issues, shadows refraction and most importantly power and LED stability if you take a slow motion capture of all current LED lights you see that the flicker quite a bit usually at much higher frequencies and more erratically than the solid 50/60hz incandescence bulbs do. And you still need to use Wi-Fi as your upload channel, communication protocols which require 2 separated mediums tend not to work very well.

Pretty much for Li-Fi to work reliably you need to build and power LED's that will produce a similar illumination stability to current laser diodes which are used in fiber optics, build light sensors on equipment and still maintain a Wireless network for your up channel, so I really don't understand why this is trying to become a thing at all.