this may scare you but....
cut her in half
then root the top half and once it has a good root system
flower both
now before you say that you cant take such a big ass clone
dont worry i've had pine trees (xmass) root on me
just stick the stem into a giant bubbler and you will be fine
it will not die
now the mother is half the height it was.....
the lst was not a bad idea but i think your'l way to close to the lights to chance it