I put some diffusion film under the lens (#7 from DC-Fix Diffusion Film Sale is my preference for this headlamp/worklight) to get a smoother beam profile with less hotspot and less tint shift. I think it really improves this flashlight!
I don’t mind the 5000K now. I find a smooth beam profile without artifacts is what makes a light really useful and pleasant.
Now the biggest need in an improved SP40 is regulated output, more so than moonlight. That would make it a damn near perfect headlamp.