Ah, stay away from anything on Amazon that isn't HLG lol....
HLG 600 is 600 true watts and offers better performance than most low to mid-priced double-ended 1000W.. Compare PAR maps and you will see.
If you want the Crème de la crème then go for HLG 650R, this lamp offers better performance than 1000W DE Gavita in 5 x 5, it will beat it in terms of yield per watt, and higher quality end product, and best of all it will do so with fewer watts.
Another reputable company you can trust is Timber Grow lights, owner/companies solid and been around for years.
Gavita LED and Fluence also offer better than HID performance but you'll pay for it with your wallet, yet performance is not better than HLG or Timber, so if you want value and bang for buck, I'd go with either of the latter companies rather than the former.