So the answer here is based a lot on the preferences you want and some techniques .You could remove some of the bigger fan leaves blocking the light from some of the lower bud sites , with that being said you should only do a little bit at a time observe your plant for a few days to watch its reaction and then repeat again if you need to . This will do 2 things for you , it will open up the bud sites to light allowing for more bud production and it will kick your plant into over driver just a little bit because it thinks its been grazed by an animal . The second thing you can do is use nutrients like "Big Bud" and "Overdrive" these 2 products used in combination basically double your yield in size they are used through out the second week through the 7th week of flowering. As for what to expect for your final yield its always a good rule of thumb that you will get 1/4 to 1/3 maybe more depending on your skill of your total wet weight , again this isn't going to be 100% this is just a guide to help you guesstimate what your going to get as a final yield . I hope this information helps shed some light to your question :) -Happy Growing!