Sorry your light is very old as far as LED lights go. It's related to the Solarforce lights in name only, before the P60 clones. I've never had one and would not know where to start. However if you're wanting to go the P60 route I could give you a list of who's making what. This will get you into a good modular light with plenty of dropins still available.I have a Solarforce 900 (very old), the LED broke, is there another, more modern replacement LED that might be retrofit? The old one was brass and threaded in.