I currently have three 2 week old babies, strain unknown. Not really interested in growing anything huge, just curious as to what my yield would be. They're in small pots with miracle grow under 26 watts.
Probably won't even get past the vegetative state if that's the type of environment you're going to continue growing them in. I'm surprised they aren't dead yet. As for your original question, yield is varies depending on a TON of factors. Their environment, the type of nutrients used, the strain itself, the lighting they get, ph levels, and the system used to grow them in just to name a handful of the hundreds of factors that exist.
26 watts, CFL ? Using the right color type? (6400K for veg, 2700K for flower). Typically you want 30+watts PER plant.