After several weeks of absence I was in my 2m2 hobby universe once again to test a few emitters for rngwn, and while doing that I did an output test of the 519A from Simon too. So here, without proper test thread, are my results. Mind that djozz-lumens are a bit higher than maukka-lumens, on average around 7%.
*some irregularities in the measurements around maximum output, I think the current knobs of my power supply are getting dirty over time and the current spontaneously fluctuates a little. Still it looks like the numbers are good enough.
*compared to 219b V1 4500K R9080, the max is twice as high, at 6.5A I measure 1400 djozz-lumen (219b: 700lm at 4A), and the voltage is 0.35V lower.
*compared to 90CRI Samsung LH351D (5000K was tested by maukka) it performs very similar, but with better tint and CRI.
I measured the tint in the hotspot from a small smooth reflector that I placed on the led at 2A current.
CCT= 4430 K
Duv= –0.0011
CRI= 94.4
R9= 95
Conclusion: wonderful 
Some pics. Next to 219B V1 4500K R9080, the package is a bit smaller. And the phosfor texture is very different, rougher which seems a trend with modern leds.
The 519A at 0.5 mA
