None of above
If I had to choose one it would be the 6500K (and thatās normally my last choice.)
Sorry, but I donāt like the purple/ rosy thing (at those levels), and 1800K is too amber/ orange for me. But thatās just me.
I actually donāt know what emitter Iād choose if I bought another Fireflies flashlight.
None of them, the 1800K is too warm and the others are too pink / purple.
+1
I have the 5000k in several lights and would use it again. Itās not āquiteā as pink as what shows in the pic.
The 3700k they have is a great normal option. Just got some in the l60-mu
The 1800K is much too orange to be used as a torch, but does make a lovely glow and works well in the NOV-Mu mule. I could have made good use of this light on a freezing cold late winters afternoon at Avebury where everything was bathed in cool blue.
Here is the river bank where I take a few of my beam shots.
This stone at Avebury would have looked impressive with some of that light on it.
As mentioned, the 3700K is the best. In fact itās the only one of the FFLs thatās even acceptable, all the rest are definite colours and thatās not what itās about. Fireflies tint lottery ought to be standardized, not different bins of the same emitter producing very different light.
I would happily take em allā¦ I quite like the rosy stuff.
If i had to choose between amber, pink, purple and white, i would chose white. High CRI is nice but in this situation I would be better mistaking a snake with a stick.
I do see a lotta love for the rosy, not just the FFL but it certainly has appeal for many. The previous batch of FFL āvery rosyā got plenty of Redditors excited, and so does the 1800K.
Be a boring place if everyone wanted 4500K-5000K NW.
Agreed. Iāve got lights from Deep Red, 1850K-7000K (probably) out to UV & I enjoy switching around as the mood suits meā¦ I know plenty of them are definitely on the green side but they have their uses, too.
Thank you!
Yes, many customers like the rosy
I do like the look of 1800K in photos but 4000K is as warm as I like to go. Mules arenāt for me, I need to check the tree-line for zombies when I park the car at night. 
Iāll go as warm as 2700K.
I prefer somewhat throwy flashlights to look out for homicidal mental patients and zombies (Michael Myers and Jason Voorhees.) 
That kinda sounds like a joke, but itās true.
I use my flashlight at night to look out for danger, and in my opinion, man can be the most dangerous animal. 
They are available now1
In my case Iām joking, I just prefer somewhat throwy lights. I live on a farm, so at night itās dark and I prefer being able to see more than a couple of metres in front of me.
I love the 1800K for bedside lighting and night time reading. Wanna try red emitters in that role, see if they are even better, less wakefulness promoting.
The 4000K rosy is actually really pleasant in person, got it in a L70 Helios and itās great for everything I tried it with, both indoors and out, doesnāt make things look unnatural, surprisingly neutral all in all