its a lot of data to digest.
the ones on top are more efficient for example go back to the first 2 graphs for bare chips and lets look at the uber efficient side of the curve
the most cost effective in $/light produced is the $12 1212:
it has a respectable ~13.5W of output at 65% and about 25W @ 60%
View attachment 3777243
where the least cost effective is the $40 cxb which has about 15W @ 65% and 34W@ 60%
View attachment 3777247
so lets peg 60% as our target, we want 1000 watts.
1000W of 1212s at 60% = 40 chips@ 25W x $12 =$480 = $0.48/W
1000W of CXB @ 60% = 30 chips @ 34W x $40 = $1200 = $1.20/W
you gotta take low level readings with a grain of salt as there is maybe 5 umol of ambient lighting not adjusted for, as well as low current measurements are less accurate. Data above 10W/100 umol should be fairly accurate tho