First of all thanks for the comments again.
I do the relay switch it is safer and better but that one you mentioned is only 10 amps don’t know if that is oke because it is only 5v or 12v.
Can I use a long thick wire from 1 power supply to feet both ends or do I need an second supply.
I see that there is also a 12v version of the sk6812, do I need also 31 ampere for 12v?
Yes this is homey compatible and it is awesome.