with 1 1000w doesn't matter how many plants you have. you'll probably only get 1.5lbs and that's if everything is on point. if you're an og pro you can probably pull 2lbs off 1 1000w but that's pretty much 1g per watt which i've never seen done before. so if you're looking to get 3lbs then i recommend doing 2 1000w and nice yeilding strain. LUI, CM, Ak, BB, Chronic, Kush, American Dream, there's too many to name. Good luck bro!!