Sound and Lighting

We are planning to use the laser light strings for the double helix structure.
For aesthetical reasons I think it is better to have lighting cables inside the tube structure than having them on the exterior.
Here is a brief illustration of how it'll work.

We are not using spot lights anymore instead we are having LED lights and Laser lights.
LED to lit up the helix and Laser lights to create light strings between the double helix.

Today, me and Nicola approximately measured the distance of where 4 speakers would be placed.(Orange dots on the left)
We have decided to place the speakers from the top of the first stairs with 7m span. In this way we can reduce the length of the cables as possible and place them evenly along the stairs.

So we will need approx. 25m,18m,11m,4m cables for ambient sound speakers.