Yeah man it will shrink quite a bit. I usually aim for the average yield, about a lb per 1k watt. Anything over that I'm happy. Lately my average is about 17-20 oz of dry, cured bud per light. Pretty happy with that considering all my nutes are 100% vegan organic and my medium is soil. I can't wait to try coco.
my buddies in Cali are giving me great feedback. This grow I am currently in, I am running 17 from clone and 5 the "normal" way I do it. Hoping to pull at least 40...that's only 1.82'oz per plant. Might not seem like a lot but to pull an oz-2 from clone has been pretty challenging. Like beaver said, don't get discouraged. It all gets better with experience. Plus to me, the more you fail, the more you learn. Knowledge is power my friends