Looks like that Bitlighter is another example of overpriced photo equipment. While it’s performance probably is worth it to a busy pro photographer, there sure is a healthy margin on the product…
Anyway, it seems they use a Nichia 144 emitter and a frosted (backside) aspheric lense with a short hood/snoot. This is a good and simple approach, so following their lead wouldn’t be a bad idea. The large LES (light emitting surface) of the 144 should help achieve smoother beam profiles.
I’d be curious how a large SunLike COB emitter would do with a frosted or dc-fix modded aspheric lense. I’m not sure if a larger or smaller diameter optic would be better, nor what focal length is better. My gut would steer me towards larger diameter and shorter FL - but really i don’t know. UF-1504 host maybe with a XHP35 driver and a GT-FC40 5000K 95CRI emitter? Should be good for ~1500lm @ 1.25A.