I've got four plants that are four weeks into veg. They're under 6 CFLs. I'm kind of anxious to start flowering. I know I should be patient but I dunno I just want to start seeing some buds growing.

I heard that they're ready to flower when they are a foot tall and one of them is nearing that height (it's already a foot wide with four sets of fan leaves that are at least three and four inches long).

The others are a little more stunted and slower growing because I underwatered them a few weeks back. I'm pretty sure the other ones aren't really ready to flower but what if I started flowering the one that seems pretty ready?

What kind of yield would I get if I started flowering in a week with a plant that is around a foot tall and a foot wide and very very bushy.

This is all assuming it is female. Of course.