Yeah, plus with 4000K and up the middle of the quadrangles is raised above the BBL, probably to merge with daylight tint (~ 0.0030 duv), on the other hand, integrated duv should be slightly lower than measured at the spot (but maybe not that much with the frosted TIR you used).
I was doubtful they would bother to check for me yes, I got no reply for ~10 days so I though they ignored me.
Simon wrote the bins he got and it’s Q2 (5700K) and R2 (5000K) so the lower duv bins. I have some 5000K coming (not interested in 5700K) so I’ll see how they test. By the way I measured my FC11 and it’s actually worse than yours :
5170K (Duv 0.0086)
(Ra) = 87.6 [ R9 = 30.8 ]
Frosted TIR, same as before. The results are about what I expected. I purchased these mostly for two reasons: slicing and tint mixing. For both purposes they should be acceptable.
Actualy no. I was just curious how are their 5700K compared to the one you have. I had one installed in Novatac and it looks great. Not so “green and yellow”...
Is this the color we saw on the first power LEDs? We all had those Ledlensers and fakes on our keychains. Stable fluorophores had yet to be found I guess. I remember, when I was in microscopy, fluorochroms had really little photon staticstics like 60000 for this green substance whose name I forgot. You could watch them fading. Or is this a completely different story?
You know, the usual. Force it into a too small TIR with a mediocre centering ring and keep tightening. It ripped it off nicely in one piece and I scraped with tweezers what tiny little bit was left.
This is in a Sofirn IF25 at lowish output (2 LEDs at 50~100lm or something).
This is great because this is exactly what I wanted, a very warm 3535 LED with high CRI, which apparently doesn’t exist.
In the same flashlight (it’s a tint ramping light) I got Convoy sourced 5000K, also sliced :
CCT = 3877K (Duv –0.0004) 93.5 [ R9 = 60.2 ]
I’m surprised of how much the CCT was reduced compared to yours, in your FC11 it reduced to 4500K. In this case 4500K kind of was what I was aiming at for the max CCT in this light, I should probably have gone with the 5700K instead.
This was measured at a pretty low output, here is turbo (should be around 3~4A per LED) : CCT = 2437K (Duv –0.0021) (Ra) = 94.0 [ R9 = 65.5 ], and lowest : CCT = 2357K (Duv –0.0013) (Ra) = 96.0 [ R9 = 73.3 ]
I didn’t measure the 5000Ks before slicing them but I’ll put one in another light so I’ll do it now.
The duv increase at higher current is strange, same behavior in the IF25 I modded with the 5000K leds (the 2700Ks have the classic current up -> duv down), so there is a middle tint point where the duv doesn’t move at all with current changes. The 5000K LH351D in my Wurkkos FC 11 behaves normally ( current up -> duv down)
I suspect that “mid point” correlates to the non-linear shape of the BBL?
Edit; and the Convoy LED being closer to 4700K than 5000K makes total sense. It still only changed by ~1000K CCT it just started out much lower than you probably thought.
(disregards the black dot, I don’t know how to display several measurements in Osram colorcalculator without doing the tint mix calculation :person_facepalming: )
“mid point” wasn’t really the right word, but at around 2800K the duv doesn’t change with current, under that it goes down with current (behavior of the 2700K lh351d from Sofirn), above it goes up with current (behavior of the 5000K lh351d from Convoy)
I was under the impression that 1000 CCT was still quite a lot ? Maybe it’s because I sliced it very low ?