I have a 2004 Dodge Sprinter that currently has incandescent bulbs all around. I want to replace some of the lights with brighter LED bulbs. Can I mix LED and incandescent bulbs? Does this change the load resistor setup that I need to use? Or do I have to get a full set of LED lights all around? I was thinking of just replacing the head lights, tail lights, and lower brake lights with LEDs and leaving the rest (parking, side markers, turn signals, center brake light) incandescent.