They should be fine, loadsa people have 'em. The'yre just filled with xenon gas and halogen and give off a colour similar to HID bulbs. They are just HID copies,not quite as bright or as directional, but are tinted to give off a similar colour and are brighter than the standard halogen bulbs. However life is shorter than standard bulbs, a trade off for the extra brigthness.
They produce less heat than their equivalent standard halogen counter parts, so should be Ok with todays modern heat resistant polycarbonate plastic lenses.