good writing, thanks! here's an article via fl_f150 that explains how they work if anyone is interested in that aspect http://www.essortment.com/hobbies/highintensityd_siyc.htm
nice write up will. but another question. just for now i want them in my fogs and what would be the best ones. 35w or 55w 3000k, 4000k, or 5000k. slim or regular bulb.
3000k would be a good fog light cuz it's yellow and would cut the fog the best. 4000k would be the next best, a little whiter but with more light output. Get the regular bulbs/ballasts, our trucks are big enough to not need the slims. 35w is plenty for fogs. I have also heard of 55w melting the lenses