I dont know how many diodes they use or what type. The reviews look good. Ya know there are a couple that say the light looks bright enough....I roll over laughing at these. lmao. If you feel like taking a chance go for it or if ya want to wait till you get a name brand with specs listed. Also this one you listed said it had enough cord to locate the driver outside the tent. A major plus on heat reduction. The other one you listed yesterday the reviews said it did not have enough cord. 

I am partial to these diodes (Samsung LM301H EVO) 

here are some specs I found Light Output PPF: 1890 µmol/s Efficiency PPE: 2.7 µmol/J

 My ac infinity specs Efficiency3.14 µmol/ and 2013 PPFD

I would like to know what diodes they use.