The best thing to do is run a seperate line from the battery to the light bulb, using a relay switched by the original light wire. Nothing frys, the bulb gets max power.
I have heard HID lights craze plastic after a while, because they burn hotter and give off different frequency light to normal bulbs.
Never seen it myself...
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Last edited by Dave Ett on Thu Aug 13, 2009 10:10 am; edited 1 time in total