SK and 3590's are very similar and will do the same thing......what I mean by dial in....feeding schedules need to be changed because of the high photons....an hps at best only runs to 40% where as the high end LED's ie SK, 3590 cob,there are a few companys that build COB lights that are badass, run up to 60% effecient which is way more photons per watt of energy consumption.....dial in per light recipe....I have seen to many people killin it with dense nugs.....usually not huge colas but dense all the way down from what I have witnesed.....@km1 i sense your passive agressive tone.....noone is questioning your grow experience or grow quality......
the more photons your plant recieves ....your nutrients have to compensate for higher nutrient conversion.....and from what I have seen you have to run ambient at a higher temp say 80-85.....just my limited knowledge