Lyon's Light Festival officially begins tomorrow the 6th and runs through until the 9th, with the 8th being the 'official' day. But the creators and technicians have to do trial runs during the run-up to it so that is what you are looking at here. Looks promising!
This event attracts hundreds of thousands of people to the centre of the city every year so I never go on the 8th because there are so many people that it's it's almost impossible to move around. But I'll go back tomorrow to take some photos etc of the real thing before the crowds get there.
I'll leave you with another video, although I suspect that what we see here isn't the complete version. Still, it's worth a look anyway.