That's a hard one bud with no real information or log to go off of. At the very least you could show us a picture. These questions are much like "Guess the jellybeans in this weird shaped jar you never seen" So many ways to grow one plant it is really hard. I will give you a guess based off your LED, what ever your wall draw of your LED (Not the compared too) allow your self .5 grams per watt. If it's a 150 watt, 75 grams. 2-3 ounces. Hope it helps some.
