Also, to go with what Kincard said: If you're farming Jeweled Collars in Konschtat, it's gonna be a long process. Not because of lights, not because of random boxes with maybe KI's etc... but because Jeweled Collars are in la Theine. :P
For those who are wondering if it's still worth farming up a Jeweled Collar in Konschtat, it really depends on your playstyle.
If you entered the final boss Chamber of burrows straight after clearing every chamber, it'd be about 21 days total between boss runs (Assumedly you'd at least get the "increased drops" buff though, so it's more like ~27 days). Then the boss has to actually drop this thing, though so far burrows bosses appear to have a decent drop rate...then you have to win the lot!
That being said, Meeble Burrows takes 15 minutes of your day every 20 hours, whereas farming gold boxes is a suicidally boring thing to do for several hours at a time. Even if I didn't have a Fast Cast+3 Jeweled Collar, I'd probably just wait it out until I could get one of these. Plenty of better things to do with my time.