Thanks for the links and info, but at least the 2016 lights seem to be integrated in an odd way. They are 4 inch pucks that you unscrew the cover to, and the lights are all on one giant disk. Unlike the incandescent ones I had in my Popup, which could be replace with a new bulb, these regretfully look like you have to replace the whole unit
I wonder if a thin gel would make it a bit yellower without cutting the light too much. They don't seem to get hot enough to cause a problem from a heat standpoint.