Hello:
I'm a Home automation integrator!
My experience is over the EIB/KNX system, with this protocol you can control, Lights, Dimmers, Scenes, Shutters (motors), Havac or underfloor heating, etc.....
That EIB/KNX is a standard of Home Automation , the first in the world, and Linux have direct drivers!
I'm waiting a device, a RS232 -EIB/KNX gateway that arrives tomorrow, i hope, to test the direct connection to Linux MCE.
With this you can control all the house, with only one User Interface!
Regards
JS