High current over 5V on PCB panes instead of track
If I would run this amount of Amps over my PCB I would need a 110mm
  wide track to carry all the load. The complete location for it on my
  PCB is only around 100mm. Can I just use 2 planes to connect
  everything together or should I worry about a short circuit?


If you were to locate all the supplies in the same place and fan out all the LED's from the same three supplies, then yes you would need roughly a 110mm track. 

It might be better to split the supplies and LED's so they are not running on the same circuit, then that would only be 40A to 200W of LED's that would make the track size smaller and more manageable. 

If you put the power supply in the middle of the LED's then you could cut the current in half and reduce the trace size further. Like this: 



Then the trace size would be a more manageable 18mm. 

Keep in mind that trace sizes vary with temperature rise and copper weight. For example:

A 1oz 12.5mm trace with a 10C rise over ambient temperature can support roughly 14A

A 1oz 12.5mm trace with a 20C rise over ambient temperature can support roughly 20A

A 2oz 12.5mm trace with a 10C rise over ambient temperature can support roughly 20A

A 2oz 12.5mm trace with a 20C rise over ambient temperature can support roughly 32A