Its very possible that it can lower your yield. But if you keep it healthy you can still get a very good yield. Most of it depends more on the strain of bud it is. How much and how long depends on the strain of bud it is as well. A good rule of thumb for indoor plants, usually around 2-3 months for flowering with a yield of anywhere from 1-6 OZs...But again, this is not accurate, it changes greatly with different strains and conditions...