It looks like my favorite KR-4 is giving me issues. The red auxiliary emitters in the RGB array aren’t functioning thus taking the red, white, and yellow functions down. This issue has been intermittent. I first noticed it when taking my light out into the cold for a night. I tried cleaning the contacts. I tried switching the tail cap and and tube to known goods from other lights. A factory reset was able to clear the issue the first time and restore the red channel, but now it looks like that isn’t working.
I wanted to run my troubleshooting by you guys to see if anyone had anything to add. One of the things is that this is one of the 2200K KR-4’s, so it is rather special. Getting a replacement head might be problematic.
I hope no one minds me piggybacking my questions on this thread. I’m not sure of how to start a new one.
A planned purchase didn’t work out and as I’d planned to buy a flashlight, the money that is freed up has already been designated as “flashlight money” and I have to buy another flashlight. (is that warped thinking or what?) I decided to buy the Noctigon KR4 I’ve had my eye on but am having trouble deciding between the aluminum version and the ti-copper. I asked Hank Wang about the difference in heat dissipation and he said the aluminum version is better. I knew that but I guess I was hoping Hang had found a way to overcome basic physics.
Does anyone have both? How much of a difference is there? The ti-copper is beautiful but I wouldn’t buy in if it was noticeably less efficient. Comparisons and opinions are welcome.