Wiring is not an issue. The C4k has a multi drop LAN. The lan cable has modules many modules in order to connect the the required inputs/ outputs. Shielded 2 pair lan cable is cheap as chips, around 40cents per meter.
I dont doubt that the Concept 4000 is sophisticated, but when you walk into a room, how do you switch the lights on?
I wasn't thinking of the cost per metre of cable; rather than wiring in switches for all the lights adds to complexity. Maybe not much if you are building from scratch, but definitely if anything is added a later date. In my circumstance, either running switch cable for 6 bays of lights back to one spot, or having to walk around the shed turning on 6 switches, would be a PITA. Plus, the remote controls allow lights to be joined in arbitrary groups, which is neat. No doubt the Concept 4k can do that, but of course then you are using a remote control to turn the lights on...
Yes, switching to LEDs rather than burning 10kw does reduce the need for individual switching!
Mind you, 1500w for ONE light fitting is quite a bit, given the lights could be on for hours at a time.