hey Swampy, I have pulled the 8 Jacks you gave me. Cut weigh was 55 ounces. I'll know the dry weigh in a couple of days( guesstimate 11ounces).
So in a space of 2 sq ft. with a 1/10 share of 1200w light not to bad. That works out to 2.56 grams per watt, or whatever.