IMHO one of the best LEDs, and not just because its a really reasonable price, is either one of the Mammoth Mint White Series leds.
The 880w Mammoth costs $800, has 2711PPF, uses Samsung EVO, High Efficiency 3000K, 5000K, 660nm, 730nm, and Emerald Green diodes. The Mammoths are extremely powerful, in the Green Spectrum, which penetrates very deeply, and are found to be a more important spectrum, than previously thought. Mammoth has the strongest Green spectrum, Ive seen.
The 8 Bar Mammoth has 3456 diodes, and uses Iventronics drivers. 5 Years warranty. IP65 wet rating.
The 680w Mammoth Mint White is 2100PPF, and uses the same diodes, 2592 Diodes, and Iventronic driver. Just less diodes, 6 bars, and not as powerful driver. IP65 Wet Rating.
The 680w Mammoth, costs $675usd, which for 2100PPF is as good as it gets, regardless of price.
Both Mammoths have a 3.1 efficiency, and also have additional UV, available. But is extra cost.
These sell as fast as they can make them. The next release will be in early December. Available for Preorder.