I hope someone has the time to answer my questions, in any case thanks in advance.

I about to buy this wirefree PIR sensor and receiver to control 5x 50W LED spots but it seams that it cant work when the spots are LED because of the different Max Watt usage of the receiver. I do not understand why this is the case. Can someone explain why???

The description says:
Receiver can control lighting up to 2300W tungsten filament/halogen or 600W fluorescent tubes and some sites also state that if you are using LED Light the limit is 200W.

????My LED spots would use 250W in total but that is too much in for this receiver????

https://www.friedland.co.uk/en-GB/S...raplusPIR/Spectrapluswirefree/Pages/L620.aspx

 

LED strips require a constant current source unlike philament based lightings that require a constant voltage source, this inference is based on LED specifications & right now I dont have any explanation for that. Probably it can be a possible clue. Let's see what other members are suggesting.