Did you read up on light cycling before you started?
I'd say your probably close to the end. Based on how long they have been going. That said I don't know the specifics of the strain. Might be safe keeping it on 12/12 for the next week or two? Definitely want to keep a very close eye on for the start of bud rot. If the bud size seems to stabilise for a few days (i.e. don't get bigger) I'd err on the side of caution and just go ahead and crop.

The last few times I grew, for drying I cut the full stalks, trimmed everything off except the sugar leaf, and hung dried them for about a week. When they were dry, I finished the trim. Then into a curing jar for 2ish weeks, burping it daily for about 30mins.

That's just what I found worked for me, I am no pot growing wizard, I'm sure there's more wisdom out there than I have.