If Jack is using a US built Cree led chip set and the good quality drivers etc etc , you could easily blow the $500 .
There's a massive price difference between the chinese led's and the US ,Japanese Germany chips .
My guess Stern would be using Chinese led's all the way , they look ok and gets it over the line .
I can asure you that Jack's boards are all made in the US , nothing on the WOZ is out source from China .