fog lights

want to change out the bulbs on the fog (driving) lights to match the new style headlights. The headlights appear blue and fog lights are white. Has anyone changed out the fog lights to match headlights and is there a bulb number for the new fog lights? Lights to be changed on 04 645ci

yes its fairly simple. find someone who sells the HIDs bulb set up.they will know the bulb number. I forgot since its been a hot minute since ive done it. the new bulbs will fit directly in. it should be either a 10000 or 12000 to get the blue color that your looking for.