ChilLED also has a 500 W kit that doesn't require any soldering, it has connectors that you only need to clip together. Grow Mouse (growmau5) is working with ChilLED so I trust they are putting out a great product. Personally if I were in the States, I would go with a PLC6. Probably only $100 to $150 more than what you could build it for, well worth it for those who don't want to build their own.