My 2 cents from my research prior to purchasing the Lenofocus.
Lenofocus is using Chinese diodes. Specifically, Refond diodes for 3K & 5K. LEDStar diodes for red. Pretty large, modern manufacturers in China. These LEDs are copies of the original SMD 2835 diodes (I think made by Epistar) which are low-mid power diodes on the market, that's why there's 672 of them vs Samsung or Epistar boards which are high-powered diodes with less diode count. Power efficiency vs PAR output is still on-par with Spider Farmer boards which is what make this Lenofocus board impressive.
Tip: The diodes on the Lenofocus boards are not ran at their maximum output even at 100% with the potentiometer supplied because it was designed to be passively cooled. With adequate fan cooling, you can change out the driver to a higher output (around 120-150W) and achieve even higher PAR. Shortened LED life is to be expected from this. Compound this with cheap reflectors you can make yourself with cardboard & reflectix tape (97% reflectivity), I wonder how much more performance you can squeeze out of this cheap board!