I had this same issue on my Sunseeker 3 years ago, and ended up having to replace all 5 clearance lights. I went with some small LED fixtures. An issue with any replacement lights is going to be the mounting holes are going to most likely be a different dimension center-to-center than the Glo-Brite lights, which in my case were screwed directly into the front cap. I know what I bought were way off. I had to fab up stand offs out of a plastic composite board, screwing those to the original holes and the new lights to the stand offs. I cut a good size hole in the middle, to make room for the wiring butt connectors too, as the original lights were wired directly. It was an all Saturday project.