Whats HLG mean? What diodes do they use? From what I've seen the Samsung lm301b are the best bang for your buck.
I dunno if I'd agree, it would cost close to €650 to build a 520w rig. Whereas I spent just shy of €250 euro for my 480w setup which was "plug n play".
It's totally compareable. We compare the parts used and the price asked, where its made makes little difference.
LM301B are old now, 301H replaced them as the B chips corrode in humidity.
HLG aka Horticulture Lighting Group are the official partner of Samsung. They invented the Quantum Board - what everyone rips off now.
A single HLG Diablo board has 648 leds. Other companies use less than half but pump up the current.
Im not knocking other lights but HLG are top quality and will last.
Latest HLG is 2.9umol per watt. Not sure what those B chips are but probably something like 2.2umol.
If you watch Migro Channel Youtube, Shane has then as No 1 on his League table.