Wurkkos TD01C with SFT40 3000K

That’s interesting, the gap between 826 lumens of your 3000K version and the 1250lm of the cool review sample is quite a bit smaller than the output gap between the LED themselves tested here. Maybe you got a over-performing sample, or 1lumen got an under-performing sample. Or maybe the optical system is somehow more transmissive of the low CCT spectrum. Really don’t know.