That’s largely dependent on your operating conditions and how you’re commanding the lights. If my 6.5W max settled power is indicative of our other Lumens then with 16V you’d expect ~400mA at max brightness, although likely with higher peak current before it settles. If you’re not running them very high then 100-300mA seems like a reasonable estimate, although I’d recommend measuring with your setup if you can.
This comment provides some context - the lights technically worked, but they flickered.
I’m unfortunately not sure on the exact timelines, or when we got the problematic batch. From a quick search of our internal communications it looks like we were investigating the issue in October of 2021, so June could be on the edge one way or the other.