I also looked up the light, as I love to buy 2 or 3, but DAMN!!, I’ve bought full licensable, road worthy cars for less than the cost of one of those light. I still want them, its just as Ponitac428 said, ithe cost is CPR inducing.
The vision worx 2.0 light is very nice quality piece but for sure it is pricey, $125 USD is what I paid. Of course being in Canada I had to pay extra shipping and import taxes on top of that. The imported knock-offs looks like they are less than half that price but even from the pictures the quality looks lacking and I've had too many faulty imported electronics and chargers that failed quickly, so I didn't want to go that route.
Vison worx shipped the light within a few hours of my purchase and I get a full life time warranty on every part of the light with vision worx so I shouldn't have to every worry about it failing, if it does I just send it back and get a new one free of charge.
Its just sort of my personal philosophy that for the most part I'd rather have fewer good quality tools than lots of cheap stuff (at least for the tools I use often) and the light is something I'll use everytime I use the mill.