height problem???

hi all
i got a bit of a problem i need help with?
got a bag seed plant i have been growing outdoors in a pot (well its from a female i cloned in may) it is just over 5 feet tall (was over six feet tall untill i topped it last week) and about 3 feet in diameter. i have had to move this indoors for security reasons and there is no way i can put it back outside.
i have just put it onto 12/12.
the problem is i only have 8 feet of height so the light will have to stop at 6 feet for obvious reasons, i have teid her down and bent her but we all know what will happen.
COULD I LAY HER FLAT
THEN I GET 5 FEET HIEGHT SPACE ECT....

heres a pic from mid june, she got a hell of a lot taller and bushy'er since then.
the brick wall is 7ft so this gives you a good scale.

Super crop her there's videos on you-tube on it. It will shorten you plant without you having to top it I have a Blue dream 2 ft wide 13 inches tall

i have just put her into 36 hrs of darkness as i cant veg her anymore, surly it is to late to super crop if she is going into flower, i know it takes 2 weeks to force her to start flowering but will it be ok to super crop her know.

anyone?????

Id' say your pretty much too far in......the only few options you have are topping it back when it was first getting its 5th set of leafs so it bushs out and doesn't grow up.....or the only other option you'd have is flowering it early this way it doesn't get that huge. The second time that I grew I had an outdoor seed and grew it indoors....i ended up having to cut it down and transplant it becuase it grew like 10 ft tall hahaha.