Every unit is hand assembled locally and tested to ensure the combination produces the claimed amout of power. Once your light is assembled specifically for you, it is then verified versus factory specifications. Any adjustments required are performed at no cost to you. The light is then properly cooled and packaged. It comes to you 100% ready to hang.Local family business, multi generational. Thank you for helping me support my family, while teaching my 5 children the value of hard work. All lights are 420% capable of growing. I use ppfd meter to verify all lights performance.