Funny how you made up that second part, the blatant lie, after you realized that first part means shit.
Even if you would have tested 70 vs 80 vs 90cri cobs, which you haven't, you comparing anything with your crappy plants has as much value as your lies. Plus you entirely missed the point... it's not the cri that matters, it means nothing on it's own. (Tell that to realstyles too lol using 5600k 93cri). The sole reason you got the 3500k 80 cri is because you followed the other sheep here and the sellers who lie it's great for plants because it fits in mccree curves.
Keep the lights off, buy your weed? Max efficiency in practice, for your mini setup, means a few $ more or less. Rather than letting efficiency numbers, wattage, and $ dictate the spectrum, ask the plants. They told me, and anyone but the cooler white cob fans, they would prefer the for them more efficient light from 2700-3000k 90cri over the commonly used veg lights. You can run those more efficient than most of the cob lights used today. Or less, a choice not dictated by cri.