CSP2323 4000K (Wurkkos HD10):
Nichia B35AM 3500K R9080 (Convoy S2+ with TIR Lens):
Cree XHP70.3 4000K R70 (Convoy M21B):
Cree XHP50.3 3000K R70 (Convoy S21E):
Samsung LH351D 400K R90 (Sofirn HS10):
So far all LEDs I tested reach the expected results. Including the CSP emitters, but I have no 6000K high CRI emitters here. Mostly warm LEDs. All results are closer to what I expect in the Windows client than the Android Smart Lighting app (as expected). Differences in lux are due to me forgetting how far from the LM4 the flashlight was between measurements… I first measured all with Windows app, then again with Android app and I have no fixed test setup where I could mount flashlights at always the same distance.
Sadly I have no spectrometer to compare, but the Windows software yields the results I expected for all LEDs (spectrum and CCT/CRI/R9 and DUV). The only thing that came unexpected was the DUV of the Samsung, as to my eyes it seems pretty neutral, but I noticed more than once that I seem notice green tints less strongly than others. 351D are known to usually be green, so I guess it makes sense, too.
I’m at the point where I trust an LM4 measurement of most light sources I own now.
The windows does weird things on my ultrawide screen (3440x1440) now. I can not move, resize, or maximize. It always stays up there in the top left corner at a fixed size and place.
Same on my notebook built-in display (2880x1800px), but with a slightly different layout:
