Halogen/HID FACTS!!

[Sparky67]

Long term, the increased amount of UV light from the HID's will cause the plastic to break down extremely quickly in comparison with a good glass.

Rhino,

According to your post, you claim that HID's produce UV (Ultraviolet light). Sorry, but HID's produce light that is in the visible spectrum, not Ultraviolet light. Here is Photonic Spectrum Reference Chart.
http://www.imt.liu.se/edu/courses/TB...6.Spectrum.pdf
Xenon HID headlights produce some continuous spectrum white light, but much of their luminous power is generated as broadened spectral lines, including blue lines at 405, 435, and 475 nm.
http://www.pubmedcentral.nih.gov/art...?artid=1771460

Also, most plastic housings now use an optical coating to protect against UV light from the sun.

Jeff

http://www.kodakgallery.com/67rscamaro