I think your best bet would be getting a jewelers loop or a BT microscope to look at the trics for the most accurate way of knowing. However typically you don’t want any clear trics mostly milky white with amber ones to your preference (amber trics = CBN ie sedative sleepy effects) and for the future I’d keep track of how long it’s been since you first flip the light cycle to 12-12 most breeders have an estimate flowering time so you’ll at least know when you’re getting close to the end ya get me