I have a couple of rota beams i am refurbishing but they came with gaskets and no domes. I was having a hard time trying to get domes so thought about what light i could use that would have a similar dome. This was an easy inexpensive solution. Those cheap rotary lights with the 3 color domes that screw on was the solution. Paid under 20. for the light with domes. Cut the bases off and drilled holes for new pins and I think it looks pretty good.