I have a working Federal Signal CJ184 PA light and needing a red or clear dome for it and the band that holds the dome on. I'm thinking about replacing the bulbs with LEDs and putting it on my truck.
If you intend to replace your beacon's sealed beam lamps with LED lightheads, please take the time to do some reading before you begin. There are plenty of threads on this very topic from over the years. You will likely find that those who have attempted such a project have had varying degrees of success, to say the least.