I'll try this one more time.
Let me clarify: HID conversions installed in a housing intended for completely different types of lights are for looks primarily. Using them for better night vision is misguided at best.
So in other words, you are saying that I installed HIDs purely for looks, or that everyone who installs them does it just for the looks? If that were the case, then why the heck is the light output 10x better than the highest wattage halogen light bulbs I could install?
If you did not do it for looks and think putting HID's in a fluted lense housing designed for different bulbs will help you see better, that's a little misguided. Do what you want, but actually read the links I posted and the graphs you already referred to. There is a reason these "conversions" are illegal on most every continent.
It's kind of like using an impact gun to put on your valve cover bolts. With lots of modifications to the gun you could get it to the point where it won't murder the bolts and shear them off... but it's still the wrong application. Using the right tool is always better than making the wrong tool work. Good night from the Eastern Daylight Savings timezone!
P.S. - The light might be 10x brighter, but not necessarily better. At a certain point even a halogen bulb would be too much for a given housing, it would need to be in a different housing designed to handle it's lumen output to put out an acceptable pattern.