A point to straighten out first: there were no male plants when the hermies began to show - I pulled them all very quickly, as soon as their maleness appeared (not great smoke, but okay for rainy day stuff :-)
<p>
I appreciate the comment about the phosphorus being okay, I didn't think that was a problem, but it's good to have some confirmation - as I say, I'm using the 60 grade, but in light doses.<p>
I think that rules IN hermie-creation by stress from light density/strength change, I'd wager on it for sure now. The problem has not grown (pun intended :-) to any other plants in the past two days as the return to halide seems to have stabilized now, and I pinched off the male patches on about 5 plants yesterday. A couple females appear to have recovered and are back to all-female. One plant isn't so lucky, it's actually got male patches MIXED into the female buds, plus the separate male patches. That one is pulled, as it really appears to be turning fully male after launching nice female buds (it should make halfway good smoke, anyway).<p>
So I guess this is a lesson of sorts, like "don't make a big lighting change while flowering is well-along" :-) But OTOH, it's not the worst disaster, like bud mold or something...or dead plants from no light at all. A VHO substitute beats that by a mile!