The theme of the festival is the season of spring, which symbolizes the awakening, growth and renaissance and there are few locations in the city with light elements. :) My friends and I, including 
The first one is located in the Art park, and its called "Twisted". It represents installation of a few elements shaped as a pine tree, and they have beautiful luminous colors.
The second story is called "Bubbles in the Waterfall" and the installation includes huge spheres placed on the stairs, also changing the color spectar.
The last one that we managed to visit is the "Laser Story" with light beams and visual installations on the near objects such as buildings and trees.
Thank you for scrolling!
Cheers,
VoodooLizard