thanks, I'm about to have three tents with 2-4 buckets in each and one Spectrum King SK402 in each. Each light yields 450-800 grams in 4x4 flowering space, so I'm running one in each of the three tents to yield at least one pound a month on perpetual grow cycle.
I know the 440 watts in the SK402 don't sound like much but it's actually high output LED used in professional grows to cut down on heat and energy cost. They can cover 6x6 space in veg and 4x4 flowering. Usually yields 1-2g per watt while other LED's yield 1g per watt.
BTW the purple LED light shown in the video is 600w HPS equivalent but 100w actual pull from wall while spectrum king is 440 watt from the wall and has output equivalent of 1200-1600 watt HPS