I got this emitter from Kaidomain on a 20 mm MCPCB.
Mounted on a CPU heatsink with a nice splash of thermal paste and over the top 16 AWG wires.
Purchase link: http://kaidomain.com/Luminus-SST-20-J4-FB4-Neutral-White-4000K-LED-Emitter?search=Luminus%20SST-20
Exact order and bin code: SST-20-W40H-A120-J4FB4 VH
A=solder pad configuration (3.25 x 3.25 mm)
120=viewing angle, 120°
J4=flux bin, 107-114 lm at 350 mA at 85°C, >118 lm at 350 mA at 25°C
FB4=tint bin, 4000 K above BBL
VH=forward voltage bin, 2.5-2.7 V at 350 mA at 85°C
CRI data measured from the hotspot with a
Yajiamei 10° beaded optics at 1000 mA
Small op reflector from the Reylight Pineapple
Medium sized smooth reflector from the Eagle Eye X7
CRI data with increasing drive current with the Yajiamei optics measured from the hotspot
Tint shift with Yajiamei 10° beaded optics with increasing drive current
Tint shift is quite linear all the way to the max output current.
Output measured in a 50 cm integrating sphere
At 350 mA I measured 121.6 lumens at 126.5 lm/W.
Emitter died shortly after being run at 7 A. I can’t see anything visibly wrong with the dead emitter.