Serials of our units are
SN 2792
SN 1866
SN 2881
SN 1553
I don't think we've gotten any sort of standard for them, but I've personally used 3 different ones under the same old light and got numbers within the same range (anecdotal).
@TwinsReef posted an update video too:
Wondering what other people think for acclimation period, I tend to do 45-60 days for no arbitrary reason when bringing something in from a low PAR situation.
Definitely check out those Quanta bars if you want to supplement. They're much cheaper than Blades and give a better spectrum.