Are we missing the point?
My understanding is that QH bulbs generate excessive UV which is usually filtered out by the glass housing. These days the housings are not glass and I doubt whether the 'plastic' (may be the wrong term for polycarbonate) filters it out. Hence the UV protection.
I was buying MR11 QH lamps for a fibre-optic decoration a year ago and the spec. included 'UV stop' or something similar. The MR11 includes a reflector but these didn't have have a glass on the front so obviously no filter. The seller sent some with the glass front but I haven't worked out a simple method to check that the filter works. Any ideas?
Have a look at this link, particularly the the paragraph titled Spectrum.
https://en.wikipedia.org/wiki/Halogen_lamp
If you haven't got the QH headlamps then I wouldn't bother about the UV protection, but if you have then think about the other drivers' eyes.
Pete