Running a 200 watt PMA should handle 55w/60w bulb. Be better for the R/R, less excess power to bleed offAs an aside, did your H4 headlight come with 55W/60W bulb? Unless you are running highway revs it will kill your battery. Put a 35W or LED in it and check again, or maybe just run without a bulb for an hour or so as an experiment.