Because I am in a apartment I can only grow one plant. how much can I get under 1000w LED and how long will the grow take?
Too many factors to answer - if you grow it in a beer cup you might harvest a quarter ounce. If you grow it in a 30 gallon pot you could hit 3/4 of a pound. Methods, environment, space, veg time for starters all come into play. I'd estimate 12 minimum to 16 weeks start to finish - depending on how long you allow the plant to grow before flowering for 8-12 weeks. J
As Jerry has stated above and If you are an experience grower with grows under the belt You could do quite well over 8zips easily as long as you veg 2-3 months and than flower out in a 20-30gallon smart pot or a like