Just switched to 12/12 with two White Widow and four unknowns

I just switched over to 12/12 last night. I have to be out of my house by October. 29th. How close do you think I will be to the date? I know it can vary. I went straight 12/12 without a dark period. I was hoping to chop on October 22nd or 23rd. Would a UVB light the last two weeks help?

Any opinions?

so that is just a bit over 8 weeks...gonna be close. I've heard of and asked about cold water shock as a means of accelerating harvest, but I've no idea if that is feasible...especially at this point. I heard you water with cold h2o and can lower temps a bit to "fool" them into thinking they need to finish fast. AGAIN - I don't know if this works or not. wait for 5-6 qweeks out before trying - at least look into this in the mean time before you need to try something.

Worst that can happen...you end up harvesting a bit early. If bud does not get to what you want (assume personal use) make honey oil, hash or butter as a means of condensing potency.