Has anyone actually had to change these things? I removed the 4 screws and ring holding the light in and it turns out it's just a H3 bulb automotive bulb in a flood light lens. The problem now is that the H3 bulb pigtail and ground wire run through a grommet and hole in the plastic housing into the cap where it is wire-nutted to the trailer wiring. The wire nut won't pull out through the hole. I think what I'm going to have to do is cut the pigtail on the old bulb to slide it out of the grommet then attach a female spade connector to the trailer side for the new bulb's pigtail. Then I can push the connector back through the hole and reattach the bulb assembly. If anyone knows a better way, please let me know. One alternative I saw was to remove the dozen or so screws that attach the housing to the cap but I'd have to re-caulk it to put it back together.