You did not mention this, but is this setup road legal? Typically, what I've heard is that HID and LEDs emit their light in a different way from incandescent lights, which is why they require different ballasts. And because of this property, it's supposedly difficult to imitate the light pattern of incandescent using the LED arrays.
Don't get me wrong. You sell lights for a living, and you know this shit better than I do. I've had plenty of moments when a schmuck in the opposite lane has one of these cheap ebay kits. The light is blinding in my side and I can clearly see that there is hardly any lumination on their side of the road. And they invariably sport the wrong version of white.