I've ordered 20 blue, 194, LED's from eBay for a project. I'm going to have four left over. I'm going to remove my instrument cluster and replace the main 194 bulbs with these blue LED's. I checked the back of my original instrument cluster (I switched to one with a tach) and there are only two 194 bulbs illuminating the speedometer, so there should be four illuminating a cluster with a tach. It should change the green gauges to a dark aqua blue, and change the orange needles a purplish color. Anyone else ever tried this?