Thank you all for the very kind words
Im very happy with the 5600k, and glad I got it. It is working perfectly and makes a great light for close range such as in my Westfalia camper.
I also really like the 3200k option, including its color, as it is not overly yellow. And after sunset it is very nice to have the warm Color Temperature, particularly since I use Incandescent light at home, which is a very close match to the Yuji.
The only issue Ive had with the lights so far, is that the 3200k is a bit stiff to turn on one handed, and sometimes if I bump it, it turns off. I have found my Fenix has the same behavior. These lights want to be turned on with a firm twist to make good contact.
I feel a little guilty for making Sofirn provide a reversible clip, since I removed one of mine, just to feel the symmetry of the tube without the clip. To use a clipless light as a headlamp, I just tuck it under my hat, and it works very well. In fact, this makes it easy to shield others from the line of sight to the LED on my head. I can use the edge of the hat to ensure that someone in front of me only has their chest illuminated, not their face.
I lubricated the Orings slightly, and did a few dozen twist cycles to start to break the Oring in so it becomes easier to use the lights one handed. The 5600k feels perfect to me, no issues. The 3200k is still a bit tight, but Im sure its just a matter of a few dozen more twist cycles and all will be smooth in Paradise.
Thumbs up and respect to slowtechstef and djozz for all the time, and effort bringing us these lights, and thanks to Sofirn for taking on the project.
These lights are actually a culmination of many good suggestions by many people here. Thank you all for adding a couple great Cockroach Lights to my selection. I can see these little lights could make handy tools for Elderly people like myself, that need help reading a menu in a dark restaurant.
thumbs up all around
Merry HolyDays