He could be using a special type of fibreglass material which its source of light powered by super bright CREED LED (5 watt or 10 Watt)

This will give the illumination effect that you see. The actual LED (or LED's is in the ceiling)

Searching for fibreglass lighting will help you in your DIY journeys :)

He could be using a special type of fibreglass material which its source of light powered by super bright CREED LED (5 watt or 10 Watt)

This will give the illumination effect that you see. The actual LED (or LED's is in the ceiling)

Here is something on ebay (50m 2mm side light flexible solid core fiber optic cable for lighting decoration) but it is driven by a bright bulb not led. It comes in various colours and has the desired effect.

But searching for fibreglass lighting will help you in your DIY journeys :)