Many people say that the yellow film will burn or melt over time. I havent seen this yet on my tints and they have been on for about a month and a half.
HID's are much much cooler than halogens. If you were to try this with halogens i would follow the reccomendations on the GRFXP site and only use your fogs when you are moving so they have cool air to keep the tints from burning or melting!
Also it helps to get excess tint just in case you mess up a few times or need to replace tints over time!