Depends on the purpose and probably the emitter. I haven’t finished experimenting with them yet.
I think the Jarmay will be good for a throwier high-CRI 519A light. I just put it in my latest mod and will try it out when it gets dark.
The Yajiamei goes well with (and is the only one I could get to fit) an SFT40 in an FW1A Pro.
The Ledil Leila LXM-D and LXM-M are good for a floodier light. I was using the LXM-D for this, but just switched my 519A stainless steel FW1A to the floodier LXM-M. The jury is still out on which I prefer.
I’ve still to find a use for the LXM-RS, but I have some more mods in the queue, so perhaps I’ll find a good combination for it.