Mmm, not in a reflector, they would be in a zoomie, this:
HWA§WYS thing I'd have to stick them under its aspheric, and use some kind of drill/bit to open up hole enough in the retaining washer to more or less keep them in a 2×2 square tetris block arrangement.
I'd say it would be 0K, I already fitted one of these nichias under the small aspheric of a Saik SA-9 I modded changing its stock XR-E, and more or less loved the result, with a much more aesthetic round & pearly zoomed emitter.
Hope I end up managing this swap (be sure lol!).
Cheers