FYI, I used autos and LEDs my first grow and I relied on trics and went FAR too long and they never did amber up.
Look for other evidence. There will be a noticeable FATTENING right before ripening. If the trics arent going amber in your setup, if it looks like it would in ta bag AND has fattened up and the white hairs are gone, its probably done.
I grow in coco, so take that for what it is worth, but don't make the mistake I did on my first grow and go too long and over ripen. You will lose terps and perhaps potency.
I am NOT saying go early, but the fattening, retraction of hairs, and appearance of a high times centerfold may be a better indicator as I have heard that LEDs and autos don't produce amber tics and experienced this combo myself.
take that for what its worth from a guy on his 2nd grow who went FAR too long with autos under LEDs
like