Sounds like you've been reading quite a bit, which is a great thing, my friend. Harvest time is probably the most subjective part of growing herb, so reading and learning from experience are your best bet.
How long did you veg the plants for? You said you planted them on Nov 5th and put them to flower on the 15th... 10 days won't give you much vegetative growth to work with, but either way... maybe just a type-o.
As for harvest date, there are plenty of posts on here for how to tell if your plants are mature. GLASSPACKEDBOWL has an excellent post in the Harvesting section called "When to Harvest?!" so I suggest you start there. It is probably the best harvesting guide you will see on here... God I wish it had been posted a year ago when I was trying my first few grows.
Afer all is said and done, it is still up to you to decide exactly when to harvest. I would still recommend a day or two of complete darkness at the very end of your flowering as it really does seem to bring the crystals out.
Good luck dude. I will be harvesting my Northern Lights #5 right about the same time, so hopefully all will work out well for you.
Cheers!
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