I want to be able to make my headlight bulbs last longer. I know the main reason they burn out is the massive current surge when you turn them on when cold. I was wondering if you put a thermistor in parallel, then the current would be split through the thermistor reducing the surge. Eventually increasing current to the bulb once the thermistor is hot. Will this work? Is there such a thing as a pre-heater for incandescent light bulbs?